25 Best Freshwater Aquarium Heaters for February 2021

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hygger 60-120 Gallon Aquarium Heater with Digital Temp Controller Shatterproof Titanium Tube 500W Submersible Fish Tank Heater Saltwater Freshwater
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hygger 60-120 Gallon Aquarium Heater with Digital Temp Controller Shatterproof Titanium Tube 500W Submersible Fish Tank Heater Saltwater Freshwater

by hygger
What We like

{EASY TO USE} Easy to set temperature without getting hands wet. Just keep pushing the button. It will cycle through all the set temperatures. Temperature can be precisely adjusted from 70 to 94F, electronic thermostat accurate to +/- 2 degrees Fahrenheit differences

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Product Features

  • {EASY TO READ LCD DISPLAY} Build-in external temp controller, easy to read LED digital number shows real time water temperature and set temperature. Indicator light let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached
  • { RUNNING DRY & OVER-HEAT PROTECTION } This fully submersible fish tank heater maintains proper temperature for your fish in a safety way, auto shut off when over-heats, resets when it cools down. The heater will shut off when removed from the water, and resume functioning upon return
  • {FOR 60-120 GAL} 500 watt aquarium heater, voltage 110-120 Volts, heater rod 7.9 inches long, suitable for tank capacity 60-120 gallon freshwater and saltwater aquariums
  • {SHATTERPROOF CORROSION RESISTANT} Corrosion resistant, shatterproof titanium tube construct heats fast, nealy unbreakable for both saltwater and freshwater aquariums. ABS plastic protective sleeve prevents fish from being scald

{shatterproof corrosion resistant} corrosion resistant, shatterproof titanium tube construct heats fast, nealy unbreakable for both saltwater and freshwater aquariums. abs plastic protective sleeve prevents fish from being scald {easy to read lcd display} build-in external temp controller, easy to read led digital number shows real time water temperature and set temperature. indicator light let you know when the heater is on. it will be red when heating and green when the proper temperature has been reached {for 60-120 gal} 500 watt aquarium heater, voltage 110-120 volts, heater rod 7.9 inches long, suitable for tank capacity 60-120 gallon freshwater and saltwater aquariums { running dry & over-heat protection } this fully submersible fish tank heater maintains proper temperature for your fish in a safety way, auto shut off when over-heats, resets when it cools down. the heater will shut off when removed from the water, and resume functioning upon return

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Marineland Precision Heater for Saltwater or Freshwater Aquariums, 200-Watt
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Marineland Precision Heater for Saltwater or Freshwater Aquariums

200-Watt

by Marineland
What We like

Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location.

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Product Features

  • Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
  • The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability
  • Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.
  • This 200 watt heater is for aquariums up to 55 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.

Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability Thermal switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down. This 200 watt heater is for aquariums up to 55 gallons. adjustable temperature dial allows you to set the temperature 1 degree with every click.

3
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AQQA Submersible Aquarium Heater,100W/200W/300W/500W/800W Fish Tank Heater,External Temperature Controller LED Temperature Display with 2 Suction Cups Suitable for Marine Saltwater and Freshwater
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AQQA Submersible Aquarium Heater

100W/200W/300W/500W/800W Fish Tank Heater, External Temperature Controller LED Temperature Display with 2 Suction Cups Suitable for Marine Saltwater and Freshwater

by AQQA
What We like

Explosion-proof Quartz Glass Aquarium Heater Durable and SaferThe heater made of explosion-proof quartz glass material and a high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction,faster water heating and long lasting.2 hours heating 1.The shell is a high temperature resistant PC material, which can effectively protect the fish from scalding.

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Product Features

  • LED External Controller with Indicator LightThe controller is not waterproof, please keep away from waterLED digital display screen shows the current water temperature and preset temperature.The number above the controller is the current water temperature, and the number below is the set temperature,Red light means heating,Blue lights indicate constant temperature,blue light flashing indicates the heater not fully submersibled.
  • Memory Function,Dry Burning-resistant ProtectionController with memory function,If power is shut off,the heater will keep the temperature settings until it powers on again,no need to worry about pets when you going out.When the heating rod is 5cm above the water surface, the heating rod will automatically power off, and the controller will display "E1". When submerged in the water again, the heater will automatically return to normal, no need to unplug the power or reset the controller.
  • Temperatures Ranges 59 to 93,Automatic HeatingThe heating rod built-in thermometer,When the water temperature is lower than the set temperature by 1, the heater will automatically heat up, and stop heating when the water temperature is consistent with the set temperature.Fahrenheit and Celsius can be converted to each other,Pressing and holding for 5 seconds changes temperature display from Celsius to Fahrenheit.

Memory function,dry burning-resistant protectioncontroller with memory function,if power is shut off,the heater will keep the temperature settings until it powers on again,no need to worry about pets when you going out.when the heating rod is 5cm above the water surface, the heating rod will automatically power off, and the controller will display "e1". when submerged in the water again, the heater will automatically return to normal, no need to unplug the power or reset the controller. Temperatures ranges 59 to 93,automatic heatingthe heating rod built-in thermometer,when the water temperature is lower than the set temperature by 1, the heater will automatically heat up, and stop heating when the water temperature is consistent with the set temperature.fahrenheit and celsius can be converted to each other,pressing and holding for 5 seconds changes temperature display from celsius to fahrenheit. Led external controller with indicator lightthe controller is not waterproof, please keep away from waterled digital display screen shows the current water temperature and preset temperature.the number above the controller is the current water temperature, and the number below is the set temperature,red light means heating,blue lights indicate constant temperature,blue light flashing indicates the heater not fully submersibled.

4
9.7
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hygger 800W Aquarium Heater, Submersible Fish Tank Water Heater with External Color LED Digital Temperature Controller, Fast Heating for 120-180 Gallon for Saltwater and Freshwater
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hygger 800W Aquarium Heater

Submersible Fish Tank Water Heater with External Color LED Digital Temperature Controller, Fast Heating for 120-180 Gallon for Saltwater and Freshwater

by hygger
What We like

ANTI-DRY PROTECTION: When the heating rod is exposed to air, display ER fault code and the heater will shut off automatically. When the heating rod is completely immersed in water, it will start working automatically. Effectively extend the service life.

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Product Features

  • LED DIGITAL DISPLAY CONTROLLER: Displays real-time water temperature or set temperature, three-digit display, water temperature display accurate to 0.1 F, easy to read. 4 kinds of work instructions - Working/Malfunction/ Thermostatic/ Out of water, easy to understand. Child Lock"KEY": need to touch 3 seconds to set the temperature.
  • RAPID HEATING: Fastest 5 seconds warming, with intelligent circuit board, the outside is wrapped with aluminum material to accelerate heat conduction and protection. Automatically reduces power when approaching the set temperature, fully utilizes thermal energy inertia to smoothly reach the set temperature, saving energy.
  • HIGH-QUALITY MATERIALS: Built-in dual temperature probe, real-time monitoring of water temperature, temperature accuracy of 1 F; high temperature resistant ABS material, no deformation and no softening, explosion-proof and anti-corrosion, no leakage of electricity. Strong suction cup bracket, can stably fix the heater in every corner of the fish tank.
  • INTELLIGENT THERMOSTAT: Over-temperature protection prevents "cooking fish". When the water temp exceeds about 93.5 F, start alternately flashing EE fault code; and over 97, the heater will stop heating automatically. When the water temp cool down to 93, the heater will start working automatically. In addition, it has a power-off memory function and no need to set it again.

Led digital display controller: displays real-time water temperature or set temperature, three-digit display, water temperature display accurate to 0.1 f, easy to read. 4 kinds of work instructions - working/malfunction/ thermostatic/ out of water, easy to understand. child lock"key": need to touch 3 seconds to set the temperature. Intelligent thermostat: over-temperature protection prevents "cooking fish". when the water temp exceeds about 93.5 f, start alternately flashing ee fault code; and over 97, the heater will stop heating automatically. when the water temp cool down to 93, the heater will start working automatically. in addition, it has a power-off memory function and no need to set it again. High-quality materials: built-in dual temperature probe, real-time monitoring of water temperature, temperature accuracy of 1 f; high temperature resistant abs material, no deformation and no softening, explosion-proof and anti-corrosion, no leakage of electricity. strong suction cup bracket, can stably fix the heater in every corner of the fish tank. Rapid heating: fastest 5 seconds warming, with intelligent circuit board, the outside is wrapped with aluminum material to accelerate heat conduction and protection. automatically reduces power when approaching the set temperature, fully utilizes thermal energy inertia to smoothly reach the set temperature, saving energy.

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9.6
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hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 800W Submersible Fish Heater for 120-180 Gallon Freshwater Marine Tank
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hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 800W Submersible Fish Heater for 120-180 Gallon Freshwater Marine Tank

by hygger
What We like

Easy to set temperature without getting hands wet. Build in hand button, Keep pushing the button. It will cycle through all the set temperatures. Temperature can be precisely adjusted from 70 to 94F

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Product Features

  • Build-in external IC temp controller, easy to read blue LED digital number shows real time water temperature. Temp accuracy is +/- 1F.
  • 800W aquarium heater, voltage 110-120V, suitable for tank capactiy 120-180 gallon freshwater and marine water aquariums
  • Made with premium titanium and double sealed by black protective guard, this fish tank heater is resistant to explosion and corrosion, and protect fish and other livestocks from punching and scalding
  • This fully submersible aquarium heater enables memory function and over heat protection. Auto shut off when over-heats, resets when it cools down.

Build-in external ic temp controller, easy to read blue led digital number shows real time water temperature. temp accuracy is +/- 1f. 800w aquarium heater, voltage 110-120v, suitable for tank capactiy 120-180 gallon freshwater and marine water aquariums This fully submersible aquarium heater enables memory function and over heat protection. auto shut off when over-heats, resets when it cools down. Made with premium titanium and double sealed by black protective guard, this fish tank heater is resistant to explosion and corrosion, and protect fish and other livestocks from punching and scalding

6
9.5
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AQQA Mini Submersible Aquarium Heater 15W,79℉(26℃) Constant Temperature Intelligent Automatic Heating,Small Fish Tank Heater with LED Light,for Freshwater and Saltwater (35W)
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AQQA Mini Submersible Aquarium Heater 15W

79℉(26℃) Constant Temperature Intelligent Automatic Heating, Small Fish Tank Heater with LED Light, for Freshwater and Saltwater (35W)

by AQQA
What We like

Mini size,perfect for small fish tanks3.3 x 2.2 x 0.8 inch Super small,but powerful.All the heating tubes are in the insulating material.Prevent the heater from being too hot and the fish from being scalded.The heating tube is not exposed and explosion-proof carbon heater,it is very safe that no small fish can touch the heating tube.

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Product Features

  • Dry burning-resistant protection and over temperature protectionWhen temperature passes 97(36),the heater will shut off automatically.When the heater is exposed to air, the heater shuts off automatically.heater heating 30 minutes, the heater stops for 3 minutes; the red led light flashes twice every 9 seconds.
  • Intelligent automatic heatingconstant temperature 79(26)Keep the water temperature at 79(26),the most comfortable temperature for the fish.When the water is lower than 77 (25) the heater turn on and heat the water,If the water is higher than 79(26) the heating will shut off.
  • Different lights have different meaningsThe red lights represent heater is on heating,red LED light flashes rapidly represent the heater is exposed to air, the green light represent the temperature of the water is higher than 79( 26) heating will stop.the green LED light flashes quickly represent temperature passes 97(36).

Intelligent automatic heatingconstant temperature 79(26)keep the water temperature at 79(26),the most comfortable temperature for the fish.when the water is lower than 77 (25) the heater turn on and heat the water,if the water is higher than 79(26) the heating will shut off. Dry burning-resistant protection and over temperature protectionwhen temperature passes 97(36),the heater will shut off automatically.when the heater is exposed to air, the heater shuts off automatically.heater heating 30 minutes, the heater stops for 3 minutes; the red led light flashes twice every 9 seconds. Different lights have different meaningsthe red lights represent heater is on heating,red led light flashes rapidly represent the heater is exposed to air, the green light represent the temperature of the water is higher than 79( 26) heating will stop.the green led light flashes quickly represent temperature passes 97(36).

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MUCH 500W Aquarium Heater Auto Thermostat Submersible Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller for Saltwater or Freshwater 70-80 Gallon
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MUCH 500W Aquarium Heater Auto Thermostat Submersible Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller for Saltwater or Freshwater 70-80 Gallon

by MUCH
What We like

Easy Installation:500W submersible heater is suitable for 60 to 150 gallons aquariums; Vertical or horizontal installation and ensure the device is fully submerged underwater

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Product Features

  • Safe & Reliable:Made of Durable Titanium alloy Tube-Our seawater resistant titanium aquarium heater is good for use both in salt water and fresh water, long service life. explosion-proof and anti-corrosion engineering, which makes this submersible heater more resistant to damage while heating better than traditional glass heaters; Built with overheat and water shortage protection
  • Wide Compatibility: The fish tank aquarium heater has CE, FCC and ROHS certification and the plug has a UL certification; Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems
  • External Temperature Controller: The touch-button controller adjusts the temperature without getting your hands wet. Its easy to control the temp from 68/20C to 94/34C; Check the size chart to find your desired fish tank heater
  • Accurate Temperature Control:An intelligent IC chip controls the heater temperature, making the temperature difference within 1/2F; Provide the best living environment for your aquatic creatures

External temperature controller: the touch-button controller adjusts the temperature without getting your hands wet. its easy to control the temp from 68/20c to 94/34c; check the size chart to find your desired fish tank heater Accurate temperature control:an intelligent ic chip controls the heater temperature, making the temperature difference within 1/2f; provide the best living environment for your aquatic creatures Safe & reliable:made of durable titanium alloy tube-our seawater resistant titanium aquarium heater is good for use both in salt water and fresh water, long service life. explosion-proof and anti-corrosion engineering, which makes this submersible heater more resistant to damage while heating better than traditional glass heaters; built with overheat and water shortage protection Wide compatibility: the fish tank aquarium heater has ce, fcc and rohs certification and the plug has a ul certification; applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems

8
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LUYS Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water Automatically Stop Heating and Over Temperature Protection System, Suitable for Marine Saltwater and Freshwater
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LUYS Aquarium Heater

Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water Automatically Stop Heating and Over Temperature Protection System, Suitable for Marine Saltwater and Freshwater

by LUYS
What We like

Wide Range of UseThis aquarium heater is suitable for many occasions. The fish market is a common place for us. It can maintain the freshness of fish. They are also suitable for places where aquatic life such as fish tanks, aquariums, and small fish ponds are kept. There are strong suction cups on the heater guard and the thermometer, it's easy to install the aquarium heater no to the tank walls or bottom, please keep them fully submerged.

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Product Features

  • Digital LED Display Controllerthe external IC temp controller of the fish tank heater can show the water temp with 2 red LED digits. The temperature in Fahrenheit and Celsius is displayed, which can be switched by pressing and holding the button for a few seconds. To set the temp, just press the button over and over until the screen displaying the temp you desired, the setting is done and the led shows the current water temp again.
  • Explosion-proof Quartz MaterialThe aquarium heater is made of high-quality quartz glass tube, it's very durable and explosion-proof, this fish tank heater can be used for saltwater and freshwater aquariums, which is pretty shatter-proof and blast-proof and prevents electricity leakage. And the stronger black protective container is scald-preventing for your aquatic organisms and your safety.
  • Intelligent Water Sensor and Over Temperature ProtectionThis aquarium heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the heater is completely out of water or it rapidly heats beyond the set temperature, the indicator light will turn green in both cases to ensure the maximum safety of you and your aquatic organisms just like protecting our own safety.

Explosion-proof quartz materialthe aquarium heater is made of high-quality quartz glass tube, it's very durable and explosion-proof, this fish tank heater can be used for saltwater and freshwater aquariums, which is pretty shatter-proof and blast-proof and prevents electricity leakage. and the stronger black protective container is scald-preventing for your aquatic organisms and your safety. Intelligent water sensor and over temperature protectionthis aquarium heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the heater is completely out of water or it rapidly heats beyond the set temperature, the indicator light will turn green in both cases to ensure the maximum safety of you and your aquatic organisms just like protecting our own safety. Digital led display controllerthe external ic temp controller of the fish tank heater can show the water temp with 2 red led digits. the temperature in fahrenheit and celsius is displayed, which can be switched by pressing and holding the button for a few seconds. to set the temp, just press the button over and over until the screen displaying the temp you desired, the setting is done and the led shows the current water temp again.

9
9.5
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BOEESPAT Aquarium Heater 300W Fish Tank Heater with Anti Scald Protector and Aquarium Thermometer Suitable for Saltwater and Freshwater (30 to 60 gallons)
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BOEESPAT Aquarium Heater 300W Fish Tank Heater with Anti Scald Protector and Aquarium Thermometer Suitable for Saltwater and Freshwater (30 to 60 gallons)

by BOEESPAT
What We like

[Rugged Shell] Durable black titanium steel heating element, covered by sturdy plastic guard, service life can last for 2 years or more.The aquarium heater comes with a sturdy clip, there are 2 strong suction cups on the clip, easy to install the heater on to the fish tank wall. The fish tank heater can be placed horizontally or vertically, but must be fully submerged under water .

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Product Features

  • [Suitable for Fresh & Salt- Water] Suitable for many tank capacity 30-60 gallon freshwater and saltwater aquariums, this thermostat will help to create a comfortable house for your pet turtles or fishes.
  • [Easy Installation Fish Tank Heater] Make sure thermometer is completely submerged underwater for minutes, temp controller is adjustable from 59 to 95F, just press set button to the set temperature, it begins to work. Please place the heating rod in the water outlet and completely immerse it in the water.
  • [300W Water Heater for 30-60Gal Aquarium ] voltage 110-120V/60HZ, power 300W, heater length 7.87 inch. It will stop heating automatically when the temp exceeds 96.8F (36C), the heater has an indicator light for current.
  • [Fully Submersible Aquarium heater] Submersible aquarium heater waterproofing IPX8 max 1M deep water immersion, premium quartz and double sealed by a black protective guard make it pretty shatter-proof and explosion-proof and prevents electricity leakage.

[easy installation fish tank heater] make sure thermometer is completely submerged underwater for minutes, temp controller is adjustable from 59 to 95f, just press set button to the set temperature, it begins to work. please place the heating rod in the water outlet and completely immerse it in the water. [suitable for fresh & salt- water] suitable for many tank capacity 30-60 gallon freshwater and saltwater aquariums, this thermostat will help to create a comfortable house for your pet turtles or fishes. [300w water heater for 30-60gal aquarium ] voltage 110-120v/60hz, power 300w, heater length 7.87 inch. it will stop heating automatically when the temp exceeds 96.8f (36c), the heater has an indicator light for current. [fully submersible aquarium heater] submersible aquarium heater waterproofing ipx8 max 1m deep water immersion, premium quartz and double sealed by a black protective guard make it pretty shatter-proof and explosion-proof and prevents electricity leakage.

10
9.4
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LEDGLE Submersible Aquarium Heater with Thermometer, Fish Tank Heater for 3 to 5 Gallon Betta Tank, Saltwater or Freshwater Aquariums, Turtle, Auto Intelligent LED Digital Display
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LEDGLE Submersible Aquarium Heater with Thermometer

Fish Tank Heater for 3 to 5 Gallon Betta Tank, Saltwater or Freshwater Aquariums, Turtle, Auto Intelligent LED Digital Display

by LEDGLE
What We like

Widely Used: Anti-explosion and 1P68 Waterproof, small thermostat creates ideal warm water conditions for your fishes to thrive in, especially apply to all kinds of tropical freshwater fish, turtles, etc.

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Product Features

  • Automatic Constant Temperature: Automatically maintains the temperature around 25-28. The aquarium heater starts heating when lower than 23.
  • Come with Diving Thermometer: Much safer to observe the water temperature of the fish tank at any time. and are available. Much safer if the temperature of the fish tank can be monitored at any time.
  • Compact & Portable Heater: 5.3x1x0.7in. Fast heating, smart thermostat is designed for 3 to gallon betta fish tank and takes up a small space.
  • Simple Installation: With 2 suction cups at the bottom, the aquarium tank heater can easily adsorb on fish tank. To make the tank temperature go more uniformity,please make the heater installed near the water outlet or inlet. The heater must be 100% immersed in water. Please unplug the power when cleaning the fish tank or changing the aquarium.

Compact & portable heater: 5.3x1x0.7in. fast heating, smart thermostat is designed for 3 to gallon betta fish tank and takes up a small space. Automatic constant temperature: automatically maintains the temperature around 25-28. the aquarium heater starts heating when lower than 23. Simple installation: with 2 suction cups at the bottom, the aquarium tank heater can easily adsorb on fish tank. to make the tank temperature go more uniformity,please make the heater installed near the water outlet or inlet. the heater must be 100% immersed in water. please unplug the power when cleaning the fish tank or changing the aquarium. Come with diving thermometer: much safer to observe the water temperature of the fish tank at any time. and are available. much safer if the temperature of the fish tank can be monitored at any time.

11
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NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustable External Controller, Suitable for Freshwater & Saltwater Tank up to 25 Gallon, 100W
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NICREW Mini Submersible Aquarium Heater

Digital Temperature Display Fish Tank Heater with Adjustable External Controller, Suitable for Freshwater & Saltwater Tank up to 25 Gallon, 100W

by NICREW
What We like

Safe and easy to use external controller help operate without getting hands wet, allow Celsius and Fahrenheit control from 68/20C to 94/34C

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Product Features

  • Equipped with precise temperature probe, making the temperature difference within 2F to provide ideal living environment for your aquariums
  • 100 watts heater is designed for 10-25 gallon fish tank
  • Automatically shut off will be activated if heater is no longer properly submerged, preventing damage
  • Ideal for freshwater and saltwater aquariums, aquaculture, glass containers, and hydroponic systems

Ideal for freshwater and saltwater aquariums, aquaculture, glass containers, and hydroponic systems Automatically shut off will be activated if heater is no longer properly submerged, preventing damage Equipped with precise temperature probe, making the temperature difference within 2f to provide ideal living environment for your aquariums 100 watts heater is designed for 10-25 gallon fish tank

12
9.1
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SZELAM Submersible Aquarium Heater,300W Fish Turtle Tank Heater with Intelligent Temperature Probe and 2 Suction Cups,Suitable for Marine Saltwater and Freshwater
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SZELAM Submersible Aquarium Heater

300W Fish Turtle Tank Heater with Intelligent Temperature Probe and 2 Suction Cups, Suitable for Marine Saltwater and Freshwater

by AquariumPets
What We like

External Temperature Controller with Dual Temp Displays. With dual LED digital displays, you can observe water temp and set temp of fresh or marine water at the same time. The external temp controller brings you more convenient and safe to adjust the set temp externally.

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Product Features

  • Precise Temperature Control with Temp Probe. Our aquarium heater has sensitive temp probe, which is more precise to control the heater temp, making the temp difference within 1 and providing the suitable living environment for your aquatic creatures.
  • Built with Overheat and Water Shortage Protection. This submersible aquarium heater is more sensitive and intelligent to resist overheat and water shortage than traditional glass heaters and it is automatically power off when taken out from water.

Built with overheat and water shortage protection. this submersible aquarium heater is more sensitive and intelligent to resist overheat and water shortage than traditional glass heaters and it is automatically power off when taken out from water. Precise temperature control with temp probe. our aquarium heater has sensitive temp probe, which is more precise to control the heater temp, making the temp difference within 1 and providing the suitable living environment for your aquatic creatures.

13
8.9
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Lineba 500W Submersible Aquarium Heater, Fish Aquarium Heater with LED Temperature Display for Fish Tank
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Lineba 500W Submersible Aquarium Heater

Fish Aquarium Heater with LED Temperature Display for Fish Tank

by LINEBA
What We like

CONSTANT TEMPERATURE- Submersible water heater can provide stable heat and a comfortable living environment to your pet fish (Please use the product at room temperature 64.4-75.2F)

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Product Features

  • POWER-OFF PROTECTION- Automatically shut-off the power to avoid overheating and damage, keeping your pet fish healthy in time.
  • SALTWATER & FRESHWATER.- The fully submersible aquarium heater is anti-corrosion whether in saltwater or freshwater.
  • EXTERNAL THERMAL CONTROL- Adjust temperature from 68-94F. External temperature control is safer for you.
  • RAPID HEATING- High heat transfer efficiency of titanium alloy and short heating time. 500 watts is ideal for large aquariums of 50-80 gallons.

Power-off protection- automatically shut-off the power to avoid overheating and damage, keeping your pet fish healthy in time. External thermal control- adjust temperature from 68-94f. external temperature control is safer for you. Saltwater & freshwater.- the fully submersible aquarium heater is anti-corrosion whether in saltwater or freshwater. Rapid heating- high heat transfer efficiency of titanium alloy and short heating time. 500 watts is ideal for large aquariums of 50-80 gallons.

14
8.8
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MQ Titanium Alloy 500W Aquarium Heater for Salt and Fresh Water, Digital LED Display Submersible Heater with External Thermostat Controller, for Fish Tank 70-80 Gallon
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MQ Titanium Alloy 500W Aquarium Heater for Salt and Fresh Water

Digital LED Display Submersible Heater with External Thermostat Controller, for Fish Tank 70-80 Gallon

by MQ
What We like

Durable Titanium Tube - This aquarium heater is made of premium Titanium Alloy, double seal material, advanced design to ensure safe operation. It has explosion-proof function while being also shatterproof and waterproof.

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Product Features

  • Easy Viewing and Safe Adjusting - It is easy and safe to adjust temperature by the external controller and the temperature will be shown on the LED screen of the heater.
  • It will stop heating when the water temp reaches to the set temp, restart heating when the water temp is 1 less than the set temp. The heater is working when the indicator light is red.
  • Wide Temperature Range - The temperature of the heater can be adjusted between 20-34, 68-93F. It is suitable for many kinds of aquariums, fishes and amphibious turtles.
  • Intelligent Temperature Control - It can ensure the temperature constant at the set point as it can adjust heating power automatically if there is any water temperature variation. So that it can avoid temperature mutation and protect fishes.

Intelligent temperature control - it can ensure the temperature constant at the set point as it can adjust heating power automatically if there is any water temperature variation. so that it can avoid temperature mutation and protect fishes. Wide temperature range - the temperature of the heater can be adjusted between 20-34, 68-93f. it is suitable for many kinds of aquariums, fishes and amphibious turtles. Easy viewing and safe adjusting - it is easy and safe to adjust temperature by the external controller and the temperature will be shown on the led screen of the heater. It will stop heating when the water temp reaches to the set temp, restart heating when the water temp is 1 less than the set temp. the heater is working when the indicator light is red.

15
8.8
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hygger Mini Betta Tank Heater for Small Fish Bowl 50W Aquarium Heater with LED Digital Display 6-9 Gallon Tank 68°F to 94°F
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hygger Mini Betta Tank Heater for Small Fish Bowl 50W Aquarium Heater with LED Digital Display 6-9 Gallon Tank 68°F to 94°F

by hygger
What We like

Build-in thermostat on the cord, this small fish heater can be easily adjusted temperature without getting your hands wet. The precision temperature control allows you to set the temperature between 68 and 94 degrees F in 2-degree increments

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Product Features

  • Betta Heater auto shut off when over-heats temperature over 97 degree Fahrenheit and flashing error code "E2". The nylon integrated fish guard prevents fish from scald and punching. Carbon heating element is more stable and safer than tranditional coil material
  • Fully-submersible heater by Hygger is easy to install with included suction cups and slim profile, super tiny size just measures 3.5 in x 2 in x 0.8 in, can easily be wedged in a corner, great for small or partially filled tank
  • Bright, clear LCD display that shows real-time water temperature over guesswork is a big bonous, display in either Celsius or Fahrenheit, depending on your choice. Red indicator light indicates the heater is working and turns into blue once it reach to desired temperature
  • 50 watt aquarium heater is ideal for 6-9 gallon fish bowls, small freshwater and saltwater aquariums, betta tank, snail tank and turtle tank

50 watt aquarium heater is ideal for 6-9 gallon fish bowls, small freshwater and saltwater aquariums, betta tank, snail tank and turtle tank Betta heater auto shut off when over-heats temperature over 97 degree fahrenheit and flashing error code "e2". the nylon integrated fish guard prevents fish from scald and punching. carbon heating element is more stable and safer than tranditional coil material Fully-submersible heater by hygger is easy to install with included suction cups and slim profile, super tiny size just measures 3.5 in x 2 in x 0.8 in, can easily be wedged in a corner, great for small or partially filled tank Bright, clear lcd display that shows real-time water temperature over guesswork is a big bonous, display in either celsius or fahrenheit, depending on your choice. red indicator light indicates the heater is working and turns into blue once it reach to desired temperature

16
8.8
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FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer
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FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer

by FREESEA
What We like

Explosion Proof:Note: 1. Aquarium heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.,Please unplug the power supply when cleaning the fish tank or aquarium water changes. 2. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision. Thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.

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Product Features

  • 100 Watt Heater: This Aquarium heater is suitable for 15 to 25 gallons aquariums, Length - 13.5 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
  • Temperature range: 63F~95F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time.
  • Intelligent temperature controlAutomatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Furthermore, Automatic safety shut-off feature, and overheating protection.

Temperature range: 63f~95f , it is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time. Intelligent temperature controlautomatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. furthermore, automatic safety shut-off feature, and overheating protection. 100 watt heater: this aquarium heater is suitable for 15 to 25 gallons aquariums, length - 13.5 inch,voltage 110-120v, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.

17
8.8
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GMsound Aquarium Heater Submersible Fish Tank Water Heater Thermostat (300W for 55-100Gal)
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GMsound Aquarium Heater Submersible Fish Tank Water Heater Thermostat (300W for 55-100Gal)

by Mylivell
What We like

High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.Fully suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.

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Product Features

  • Adjustable Temperature: The temperature of the fish tank heater can be adjusted automatically. Temperature setting range: 65 F - 93 F(20C~34C), and the display is easy to read.
  • Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank. The polarized plug prevents electrical shock.
  • Fully Submersible. Power: 300W. Suggested water volume: 55-100 gal.
  • Set desired aquarium temperature & on/off indicator light confirms operation. *On/off indicator light allows simple, visual confirmation of heater operation.

Fully submersible. power: 300w. suggested water volume: 55-100 gal. Set desired aquarium temperature & on/off indicator light confirms operation. *on/off indicator light allows simple, visual confirmation of heater operation. Adjustable temperature: the temperature of the fish tank heater can be adjusted automatically. temperature setting range: 65 f - 93 f(20c~34c), and the display is easy to read. Convenient and safe: our aquarium heater thermostat has two suction cups for attachment to the fish tank. the polarized plug prevents electrical shock.

18
8.8
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100W Aquarium Heater for Fish Tank Mini Fish Heater Small Submersible Tank Heater with Built-in Thermometer Double Displays & Remote Controller for 5-20 Gallon Tank
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SeaELF 100W Aquarium Heater for Fish Tank Mini Fish Heater Small Submersible Tank Heater with Built-in Thermometer Double Displays & Remote Controller for 5-20 Gallon Tank

by SeaELF
What We like

🐠 Double Heating Tubes with Premium Material : Adopt advanced thick quartz, double heating tubes for heat up quickly, explosion-proof anti-corrosion, double-layer waterproof insulation, IP68 high grade waterproof standard. Cover with high temperature resistant shell can effectively isolate part of the temperature and prevent scalding fish. The turtle shape fish tank heater is perfect for small aquarium tanks, suitable for freshwater and saltwater.

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Product Features

  • 🐠 Intelligent Constant & Over Temperature Protection: The aquarium heater come with intelligent design, once the temperature 1F from the set temperature, this tank heater will stop / start heating, and the green/red light on, provide a constant warm for your pet fish to stay healthy . Once the water temperature is more than 93F, the tank heater will display H1 and forced to stop heating, intelligent protect your pets well.
  • 🐠 Built-in Thermometer & Double Display System & Remote Controller: SeaELF 100W aquarium heater built-in thermometer, allow to know the tanks instant temperature, no need to purchase extra thermometer. Double display system design, more accurate to 0.1F, safe and reliable choice to protect pets. Easy to setting and adjusting the aquarium heaters temperature by remote controller without wet your hands. (The remote is non waterproof, please keep it away from water).
  • 🐠 Double Precise Probes & Intelligent Lack-water Protection: This aquarium heater has double precise probes for pinpoint temperature, accurate to 0.1F. Once the heaters probe detected there is lack of water, the heater will display E1, stop heating and the orange light on. It will work again once the heater into water.

🐠 double precise probes & intelligent lack-water protection: this aquarium heater has double precise probes for pinpoint temperature, accurate to 0.1f. once the heaters probe detected there is lack of water, the heater will display e1, stop heating and the orange light on. it will work again once the heater into water. 🐠 intelligent constant & over temperature protection: the aquarium heater come with intelligent design, once the temperature 1f from the set temperature, this tank heater will stop / start heating, and the green/red light on, provide a constant warm for your pet fish to stay healthy . once the water temperature is more than 93f, the tank heater will display h1 and forced to stop heating, intelligent protect your pets well. 🐠 built-in thermometer & double display system & remote controller: SeaELF 100w aquarium heater built-in thermometer, allow to know the tanks instant temperature, no need to purchase extra thermometer. double display system design, more accurate to 0.1f, safe and reliable choice to protect pets. easy to setting and adjusting the aquarium heaters temperature by remote controller without wet your hands. (the remote is non waterproof, please keep it away from water).

19
8.7
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AQQA Aquarium Heater, 100W 200W 300W Quartz Glass Submersible Heater with LED Temperature Display and External Temperature Controller for Freshwater and Saltwater (800W for 80-220 Gallon Tank)
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AQQA Aquarium Heater

100W 200W 300W Quartz Glass Submersible Heater with LED Temperature Display and External Temperature Controller for Freshwater and Saltwater (800W for 80-220 Gallon Tank)

by AQQA
What We like

INTELLIGENT AUTOMATIC HEATING: Automatic constant temperature function, design with External Temperature Controller, Temperature Range is 68-9320 C-34C, hold down the "+""-" set button at the same time for 5 seconds, switch easily from Celsius to Fahrenheit. It will restart to heating when the water temp is 1(1 C ) off the set temp. If power is shut off, the heater will keep the temperature settings until it powers on again

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Product Features

  • EASY INSTALLATION: Easy and quick installation, submersible fish tank heater, vertical or horizontal placement using attached adjustable hanging rack and 2 suction cups. NOTE: Please make sure that the heater is completely submerged in the water before turning on the power, and install it near the water flowing area to prevent uneven heating
  • SAFE& DURABLE: Made of heat-resistant quartz glass and PC plastic cover, double seal material, providing explosion-proof, shatterproof, IP68 waterproof, much safer for human and your lovely fishes, your pets will no longer fear the winter
  • DUAL TEMP DISPLAYS: LED display on the middle of the controller front side, Current Temp and Set Temp. If your heater is working properly, the red light will be constant on. When the temperature is reached 93(34), it will stop work, the blue light will be constant on. When the heater exposed to air and is not fully submerged, then display E1 fault

Dual temp displays: led display on the middle of the controller front side, current temp and set temp. if your heater is working properly, the red light will be constant on. when the temperature is reached 93(34), it will stop work, the blue light will be constant on. when the heater exposed to air and is not fully submerged, then display e1 fault Easy installation: easy and quick installation, submersible fish tank heater, vertical or horizontal placement using attached adjustable hanging rack and 2 suction cups. note: please make sure that the heater is completely submerged in the water before turning on the power, and install it near the water flowing area to prevent uneven heating Safe& durable: made of heat-resistant quartz glass and pc plastic cover, double seal material, providing explosion-proof, shatterproof, ip68 waterproof, much safer for human and your lovely fishes, your pets will no longer fear the winter

20
8.7
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hygger Submersible Aquarium Heater,100W /300W Adjustable Fish Tank Heater with External Temp Controller Auto Thermostat Heater for 10-60 Gallon Saltwater and Freshwater Tank (300W)
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hygger Submersible Aquarium Heater

100W /300W Adjustable Fish Tank Heater with External Temp Controller Auto Thermostat Heater for 10-60 Gallon Saltwater and Freshwater Tank (300W)

by hygger
What We like

OVERHEAT PROTECTION: When the water temperature is over 97F, the aquarium heater will auto shut down. If a fault occurs, the backup circuit in the controller will work to shut it down. It provides a warm and sustainable environment while keeping a safe life for fish.

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Product Features

  • FULLY AUTOMATIC CONTROL: When the water temperature is higher than the set temperature value, the fish tank heater will automatically stop; if the water temperature is lower than the set temperature, the heater will automatically start heating (error is 1.5-2F).
  • TEMPERATURE ADJUSTMENT: Set the temperature on the adjustment wheel outside the aquarium. The adjustment knob of submersible aquarium heater can select the temperature between 75F and 91F , Temp Control Accuracy2,Temp Accuracy:1, without worrying about hand wetness.
  • RELIABLE QUALITY: Use milky quartz material, can resist a high temp of 1800 fahrenheit degree, excellent in explosion-proof and shatter-resistant, to prevent burns on your pet. Fish tank water Heater is suitable for saltwater and freshwater, fast heating, corrosion resistance and oxidation resistance.
  • 300W AQUARIUM HEATER: For 30 to 60 gallon fish tanks, with a precision probe inside, it is possible to monitor heat more efficiently and avoid "cooking fish", and it can be fixed on the inner glass of the aquarium with suction cup without disturbing the fish.

300w aquarium heater: for 30 to 60 gallon fish tanks, with a precision probe inside, it is possible to monitor heat more efficiently and avoid "cooking fish", and it can be fixed on the inner glass of the aquarium with suction cup without disturbing the fish. Reliable quality: use milky quartz material, can resist a high temp of 1800 fahrenheit degree, excellent in explosion-proof and shatter-resistant, to prevent burns on your pet. fish tank water heater is suitable for saltwater and freshwater, fast heating, corrosion resistance and oxidation resistance. Temperature adjustment: set the temperature on the adjustment wheel outside the aquarium. the adjustment knob of submersible aquarium heater can select the temperature between 75f and 91f , temp control accuracy2,temp accuracy:1, without worrying about hand wetness. Fully automatic control: when the water temperature is higher than the set temperature value, the fish tank heater will automatically stop; if the water temperature is lower than the set temperature, the heater will automatically start heating (error is 1.5-2f).

21
8.5
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Orlushy Mini Aquarium Heater 100W,Small Fish Tank Heaters with LED Digital Temperature Display and External Temperature Controller for Betta Frogs Newts Turtles(100W)
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Orlushy Mini Aquarium Heater 100W

Small Fish Tank Heaters with LED Digital Temperature Display and External Temperature Controller for Betta Frogs Newts Turtles(100W)

by Nova pet supplies co.LTD
What We like

LED Display Design: LED digital display, External temperature controller,easy to use and Safety.

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Product Features

  • 100W Submersible Aquarium Heater is Suitable for 10-20 Gallon.Temperature range: 65F~93F18C~34C, power cord is 5 FT.
  • The Digital Smart Aquarium Heater is a heater and thermometer combined into one, eliminating the need for more equipment in smaller tanks.
  • Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems .
  • Please be sure that the heater needs to be completely sunk into water, horizontal or vertical fixed in the water cycle better place, and let the working light can be seen as clear as possible.

applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems . please be sure that the heater needs to be completely sunk into water, horizontal or vertical fixed in the water cycle better place, and let the working light can be seen as clear as possible. the digital smart aquarium heater is a heater and thermometer combined into one, eliminating the need for more equipment in smaller tanks. 100w submersible aquarium heater is suitable for 10-20 gallon.temperature range: 65f~93f18c~34c, power cord is 5 ft.

22
8.2
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Sheye 500W Aquarium Heater, Fast Heating Submersible Thermostat, Titanium Fish Tank Heater, with LED Digital Display and External Temperature Controller, for Salt/Fresh Water
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Sheye 500W Aquarium Heater

Fast Heating Submersible Thermostat, Titanium Fish Tank Heater, with LED Digital Display and External Temperature Controller, for Salt/Fresh Water

by Sheye
What We like

[External Temperature Controller]: The touch-button controller adjusts the temperature without getting your hands wet. Its easy to control the temp from 68/20C to 94/34C.

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Product Features

  • [Rapid Heating]: Aquarium heaters is made of high quality Titanium metal, high heat transfer efficiency and short heating time. 500 watts is ideal for large aquariums of 60-150 gallons.
  • [Safe & Reliable]: Accurate temperature control making the temperature difference within 1/2F; automatically shut-off the power to avoid overheating and damage, keeping your fish healthy.
  • [Wide Compatibility]: The fish tank aquarium heater applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems.
  • [Easy Installation]: Vertical or horizontal installation and ensure the device is fully submerged underwater.

[easy installation]: vertical or horizontal installation and ensure the device is fully submerged underwater. [wide compatibility]: the fish tank aquarium heater applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems. [safe & reliable]: accurate temperature control making the temperature difference within 1/2f; automatically shut-off the power to avoid overheating and damage, keeping your fish healthy. [rapid heating]: aquarium heaters is made of high quality titanium metal, high heat transfer efficiency and short heating time. 500 watts is ideal for large aquariums of 60-150 gallons.

23
7.5
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TOOSELL 500W Aquarium Heater, Titanium Tube with Intelligent LED Temperature Display and External Temperature Controller, Fish Tank Heaters Auto Thermostat for Fresh Water, Marine Water, Aquaculture
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TOOSELL 500W Aquarium Heater

Titanium Tube with Intelligent LED Temperature Display and External Temperature Controller, Fish Tank Heaters Auto Thermostat for Fresh Water, Marine Water, Aquaculture

by Toosell
What We like

PREMIUM MATERIALSThe aquarium heater made of durable titanium alloy tube is suitable for fresh water, salt water and other waters, durable and long service life.

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Product Features

  • EXQUISITE AND SMALL, DOES NOT TAKE UP SPACE: small size, easy to hide in the water tank, and with 2 suction cups, can stabilize the heater in the position of the water tank, and is suitable for 250-350L fish tanks.
  • SAFE TO USE & EASY TO OPERATE: First, after installing the aquarium heater and thermometer correctly, just set the required heating temperature, and the blue indicator light can ensure that the temperature is constant at the set point, because if there is water temperature, it Can automatically adjust the heating power variation, and ON/OFF switch and adjustable temperature controller.
  • The dual sensing probes on the top of the heater can provide more precise sensing. Through temperature control, there are indicators on the LED display to show the heating status. Long press the "Settings" key to switch between degrees Celsius and Fahrenheit. In addition, using a constant temperature controller, the temperature can be set from 68F to 94F, adjusted to a temperature suitable for fish, and the anti-scalding heater cover can prevent the fish from getting too close to the heater.

Safe to use & easy to operate: first, after installing the aquarium heater and thermometer correctly, just set the required heating temperature, and the blue indicator light can ensure that the temperature is constant at the set point, because if there is water temperature, it can automatically adjust the heating power variation, and on/off switch and adjustable temperature controller. The dual sensing probes on the top of the heater can provide more precise sensing. through temperature control, there are indicators on the led display to show the heating status. long press the "settings" key to switch between degrees celsius and fahrenheit. in addition, using a constant temperature controller, the temperature can be set from 68f to 94f, adjusted to a temperature suitable for fish, and the anti-scalding heater cover can prevent the fish from getting too close to the heater. Exquisite and small, does not take up space: small size, easy to hide in the water tank, and with 2 suction cups, can stabilize the heater in the position of the water tank, and is suitable for 250-350l fish tanks.

24
7
SCORE
Orlushy Submersible Aquarium Heater 100W for Marine Reef Fish Tank Sump
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Orlushy Submersible Aquarium Heater 100W for Marine Reef Fish Tank Sump

by Nova pet supplies co.LTD
What We like

Precise temperature dial from 68 to 89F allows for complete control of aquatic climate within a 1-degree difference.

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Product Features

  • It shows an area to adjust the temperature. It's not exactly accurate but it turns easy and can be adjusted at small intervals.
  • Explosion Proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.
  • 100W aquarium heater is suitable for 15 to 30 gallons aquariums,Length - 9",voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.
  • Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature. Automatic shut off when the temperature is reached

It shows an area to adjust the temperature. it's not exactly accurate but it turns easy and can be adjusted at small intervals. 100w aquarium heater is suitable for 15 to 30 gallons aquariums,length - 9",voltage 110-120v, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart. Explosion proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank. Adjustable aquarium fish tank water heater sensitive and reliable thermostat maintains uniform temperature. automatic shut off when the temperature is reached

25
7
SCORE
HITOP Adjustable Submersible Aquarium Fish Tank Heater, 50W 100W 200W 300W 500W for Fish Tank (300W)
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HITOP Adjustable Submersible Aquarium Fish Tank Heater

50W 100W 200W 300W 500W for Fish Tank (300W)

by Haisen
What We like

[Compact design/60-120gal] Size: 11.4*2.2*1.2in, simple rectangle design, not only easy to hide, but also save space. This 300W aquarium heater is suitable for 50-120 Gallon large and medium-sized fish tanks and turtle tanks.Comes with 4 suction cups and a stick-on thermometer.

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Product Features

  • [PTC ceramic heating element] Compared with the fish tank heater heated by resistance wire, this 300W PTC ceramic fish tank heater has the obvious advantages of high heating efficiency, low energy consumption, long service life and anti-rust.
  • [Accurate] The ultra-sensitive internal temperature detection system can sense the tank-temp change in time, so that it can be heated and stopped in time to keep the fish at a comfortable temperature. Therefore this fish heater can also avoid overheating.
  • [Removable protective shell] This aquarium heater has a detachable protective shell, which can not only prevent aquarium pets from being injured by touching the heating part, but also can be easily removed for cleaning.
  • [Adjustable and easy to use] Adjustable rang is 63-90F. After set the temp you want, when the tank-temp reaches the set-temp, it will stop heating auto, and when the tank-temp is lower than the set-temp, it will start heating auto, easy to operate.

[adjustable and easy to use] adjustable rang is 63-90f. after set the temp you want, when the tank-temp reaches the set-temp, it will stop heating auto, and when the tank-temp is lower than the set-temp, it will start heating auto, easy to operate. [removable protective shell] this aquarium heater has a detachable protective shell, which can not only prevent aquarium pets from being injured by touching the heating part, but also can be easily removed for cleaning. [ptc ceramic heating element] compared with the fish tank heater heated by resistance wire, this 300w ptc ceramic fish tank heater has the obvious advantages of high heating efficiency, low energy consumption, long service life and anti-rust. [accurate] the ultra-sensitive internal temperature detection system can sense the tank-temp change in time, so that it can be heated and stopped in time to keep the fish at a comfortable temperature. therefore this fish heater can also avoid overheating.

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