25 Best Jager Aquarium Heaters
for March 2021

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1
9.9
SCORE
Jager Aquarium Heater - 250W - 17 in - 106-159 Gallons

Eheim Jager Aquarium Heater

250W, 17 in, 106-159 Gallons

by Eheim Gmbh & Co. Kg
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2
9.9
SCORE
EHEIM Jager Aquarium Thermostat Heater 100W

EHEIM Jager Aquarium Thermostat Heater 100W

by Eheim
What We like

On/Off indicator light for at-a-glance monitoring

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Product Features

  • Fully submersible
  • Will automatically turn off when water level dips too low
  • TruTemp dial recalibrates the heater for precise temperature regulation
  • Made of shock resistant and shatter proof glass for fresh or marine water
  • Thermo safey control protects against running dry

Will automatically turn off when water level dips too low Trutemp dial recalibrates the heater for precise temperature regulation Made of shock resistant and shatter proof glass for fresh or marine water Thermo safey control protects against running dry Fully submersible

3
9.7
SCORE
Jager Trutemp Aquarium Heater 12 100 Watt

Eheim Jager Trutemp Aquarium Heater 12 100 Watt

by Eheim Gmbh & Co. Kg
What We like

OLD

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4
9.6
SCORE
EHEIM Jager Aquarium Thermostat Heater 300W

EHEIM Jager Aquarium Thermostat Heater 300W

by Eheim
What We like

On/Off indicator light for at-a-glance monitoring

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Product Features

  • Fully submersible
  • Made of shock resistant and shatter proof glass for fresh or marine water
  • TruTemp dial recalibrates the heater for precise temperature regulation
  • Will automatically turn off when water level dips too low
  • Thermo safey control protects against running dry

Thermo safey control protects against running dry Trutemp dial recalibrates the heater for precise temperature regulation Fully submersible Made of shock resistant and shatter proof glass for fresh or marine water Will automatically turn off when water level dips too low

5
9.6
SCORE
Jager Trutemp Aquarium Heater 10.2

Eheim Jager Trutemp Aquarium Heater 10.2" 75 Watt

by EHEIM
What We like

On/Off indicator light for at-a-glance monitoring

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6
9.5
SCORE
Eheim Jager Trutemp Aquarium Heater 13

Eheim Jager Trutemp Aquarium Heater 13" 150 Wt

by EHEIM
What We like

Automatic dry run shut off fully sumersible Special shatterproof glass Heating function indicator Precise temperature control Temperature recalibration 13" 150 watt

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Product Features

  • Eheim Products - Jager Aquarium Heater

EHEIM products - jager aquarium heater

7
9.4
SCORE
Jager Trutemp Aquarium Heater 9

Eheim Jager Trutemp Aquarium Heater 9" 50 Wt

by EHEIM
What We like

Automatic dry run shut off fully sumersible Special shatterproof glass Heating function indicator Precise temperature control Temperature recalibration 9" 50 watt

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Product Features

  • Eheim Products - Jager Aquarium Heater

EHEIM products - jager aquarium heater

8
9.4
SCORE
hygger 50W Titanium Aquarium Heater for Salt Water and Fresh Water, Digital Submersible Heater with External IC Thermostat Controller and Thermometer, for Fish Tank 5-10 Gallon

hygger 50W Titanium Aquarium Heater for Salt Water and Fresh Water

Digital Submersible Heater with External IC Thermostat Controller and Thermometer, for Fish Tank 5-10 Gallon

by hygger
What We like

Durable Titanium Tubethis seawater resistant titanium aquarium heater is good for use in salt water and fresh water, service life can be 3 years or more. Very compact small, easy to hide in the tank. Don't suggest to use it in sump. The diameter of the titanium tube is19mm, you can buy suction cups suitable for this size when you need to get that replaced.

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Product Features

  • Fully Automatic Controlvery easy and reliable to use. After well installing the aquarium heater and the thermometer, you just need to set the desired heating temp, it will stop heating when the water temp reaches to the set temp, it will automatically restart heating when the water temp is 1 less than the set temp. The controller has temp setting remember function
  • Digital LED Displaythe IC temp controller can show the water temp and set temp at the same time, and there is a indicator light to show the heating status. You can press the 'up' key to shift degree unit between Celsius and Fahrenheit
  • For Fish Tank 5-10 Gallonvoltage 110-120V, power 50W, heater rod length 8.7inch. The heater and controller power cords are the same length 5.5ft, the thermometer cord is 4.4ft. There are mounting holes on the temp controller back for hanging on the wall
  • Wide Temperature RangeWith the thermostat controller you can set the temp from 32to 104, control precision is 1, please set the right temp for your aquarium pets. The separate thermometer can detect a temperature from -68 to 140, the measurement accuracy is 0.2 plus or minus, very sensitive

Wide temperature rangewith the thermostat controller you can set the temp from 32to 104, control precision is 1, please set the right temp for your aquarium pets. the separate thermometer can detect a temperature from -68 to 140, the measurement accuracy is 0.2 plus or minus, very sensitive Digital led displaythe ic temp controller can show the water temp and set temp at the same time, and there is a indicator light to show the heating status. you can press the 'up' key to shift degree unit between celsius and fahrenheit For fish tank 5-10 gallonvoltage 110-120v, power 50w, heater rod length 8.7inch. the heater and controller power cords are the same length 5.5ft, the thermometer cord is 4.4ft. there are mounting holes on the temp controller back for hanging on the wall Fully automatic controlvery easy and reliable to use. after well installing the aquarium heater and the thermometer, you just need to set the desired heating temp, it will stop heating when the water temp reaches to the set temp, it will automatically restart heating when the water temp is 1 less than the set temp. the controller has temp setting remember function

9
9.4
SCORE
hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 500W Submersible Fish Heater for 60-120 Gallon Freshwater Marine Tank

hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 500W Submersible Fish Heater for 60-120 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 LED digital number shows real time water temperature. Temp accuracy is +/- 1F.
  • This fully submersible aquarium heater enables memory function and over heat protection. Auto shut off when over-heats, resets when it cools down
  • 500 watt aquarium heater, voltage 110-120V, suitable for tank capactiy 60-120 gallon freshwater and saltwater 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

Build-in external ic temp controller, easy to read led digital number shows real time water temperature. temp accuracy is +/- 1f. 500 watt aquarium heater, voltage 110-120v, suitable for tank capactiy 60-120 gallon freshwater and saltwater 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

10
9.3
SCORE
boxtech Aquarium Heater 50W, Submersible Fish Tank Thermostat Proof Explosion and Auto Digital Control, with Heat-Resistant Quartz Made for 5-15 Gallon

boxtech Aquarium Heater 50W

Submersible Fish Tank Thermostat Proof Explosion and Auto Digital Control, with Heat-Resistant Quartz Made for 5-15 Gallon

by BOXTECH
What We like

Fully Automatic Control: Design with External Temperature Controller, Temperature Range is 68 F-90 F, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating

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Product Features

  • Notice Please: Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater
  • Fish Tank Thermostat: 50W aquarium heaters suit for 5-15 Gallon fish tank. Voltage:110V, Power cord is 4.59ft, Max deep water immersion 20 inch/1.7 FT
  • Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water flow.This way the heater can quickly sense the water temperature and make adjustments automatically, Keep the aquarium heater fully submerged in water
  • Quartz Tube Safety Protection: Made of heat-resistant milky quartz Glass and UL-Approved Power Cord, Controller IPX4, Heater IPX8 that make it pretty shatter-proof and Explosion-proof and prevents electricity leakage, service life can be 3 years or more

Quartz tube safety protection: made of heat-resistant milky quartz glass and ul-approved power cord, controller ipx4, heater ipx8 that make it pretty shatter-proof and explosion-proof and prevents electricity leakage, service life can be 3 years or more Correct installation: stick the heater vertical onto the tank side near the water intake or on the way of water flow.this way the heater can quickly sense the water temperature and make adjustments automatically, keep the aquarium heater fully submerged in water Notice please: before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater Fish tank thermostat: 50w aquarium heaters suit for 5-15 gallon fish tank. voltage:110v, power cord is 4.59ft, max deep water immersion 20 inch/1.7 ft

11
9.2
SCORE
NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, 250 Watt, for 40 to 75 Gallon Tank

NICREW Preset Aquarium Heater

Submersible Fish Tank Heater with Electronic Thermostat, 250 Watt, for 40 to 75 Gallon Tank

by NICREW
What We like

250 watt heater is designed for 40 to 75 gallon aquariums

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Product Features

  • Preset to 78F - no adjustment required, electronic thermostat automatically maintains water temperature
  • Made from shatter-resistant quartz glass, which helps to keep your fish and other aquarium dwellers safe
  • LED indicator light displays red when actively heating off when temperature reached
  • Automatic safety shut-off and overheat protection

Made from shatter-resistant quartz glass, which helps to keep your fish and other aquarium dwellers safe Preset to 78f - no adjustment required, electronic thermostat automatically maintains water temperature Automatic safety shut-off and overheat protection Led indicator light displays red when actively heating off when temperature reached

12
9.1
SCORE
Fluval M200 Submersible Heater, 200-Watt Heater for Aquariums up to 65 Gal., A784

Fluval M200 Submersible Heater

200-Watt Heater for Aquariums up to 65 Gal., A784

by Fluval
What We like

Easy to install with slim profile tube for easy placement

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Product Features

  • Computer-calibrated thermostat and easy-to-adjust temperature control dial
  • Shock resistant Borosilicate glass and high density ceramic heat sick
  • Aquarium heater that blends into the aquarium environment with built-in reflective technology that mirrors the surrounding colors

Computer-calibrated thermostat and easy-to-adjust temperature control dial Shock resistant borosilicate glass and high density ceramic heat sick Aquarium heater that blends into the aquarium environment with built-in reflective technology that mirrors the surrounding colors

13
8.9
SCORE
EHEIM JAGER HEATER 12

EHEIM JAGER HEATER 12" 100WATT [Misc.]

by EHEIM
What We like

Pet Habitats & Supplies

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Product Features

  • AQUARIUM SUPPLIES
  • HEATERS SUBMERSIBLE

Aquarium supplies Heaters submersible

14
8.8
SCORE
Ehm Heater Jager 300w

Eheim Ehm Heater Jager 300w

by EHEIM
What We like

Jager Trutemp Aquarium Heater 20" 300 Wt

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15
8.8
SCORE
Hydor 200W Submersible Glass Aquarium Heater - Original Theo

Hydor 200W Submersible Glass Aquarium Heater

Original Theo

by Hydor USA, Inc.
What We like

No damage in case of running dry

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Product Features

  • Position vertical, horizontal and completely submerged
  • Graduated scale for precise maintenance of set temperature
  • High resistance - the first shatter proof heater
  • Shock resistant

Position vertical, horizontal and completely submerged Graduated scale for precise maintenance of set temperature Shock resistant High resistance - the first shatter proof heater

16
8.7
SCORE
EHEIM NORTH AMERICA - JAGER HEATER 150W (13

EHEIM NORTH AMERICA

JAGER HEATER 150W (13"") "Ctg: AQUATIC PRODUCTS, AQUATICS, TANK HEATERS"

by Eheim Gmbh & Co. Kg
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17
8.7
SCORE
DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter

DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter

by DaToo
What We like

Perfect Aquarium External Heater For Your Needs: For every hobbyist or professional fish breeder with a canister filter, a perfect external heater is essential. DaToo Aquarium External Heater is specially designed for canister filter. Leading temperature control system, precise overheat protection, provides a warm, safe and comfortable living environment for your beloved fish!!

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Product Features

  • Leading Temperature Control System: For the health of fish, a precise and constant temperature is very important. DaToo Heater's temperature control system uses advanced STM8 chip, which ensures that DaToo has a precise and perfect temperature control over the 68 to 95 range. Just set the temperature that you need, DaToo will create a comfortable environment for your beloved fish. Very Easy! Clear and large LED display, only need a light glance, you can know the current water temperature.
  • Safe Over-Heat Protection: DaToo Aquarium External Heater has two temperature sensors, one at the heater inlet and the other at the outlet. This makes DaToo heater can be more accurate to measure temperature change. When the temperature exceeds the set temperature by 0.2 , the heater immediately stops heating, the maximum to protect the safety of the lovely fish.
  • Replaceable Inlet And Outlet: For different Canister Filter needs, we have prepared three different sizes of inlet and outlet heads in the box, 1/2" (12mm), 5/8" (16mm) and 20mm. You can choose a appropriate head as needed. A cleaning brush is also in the box and you can use it to clean the inside of the heater. DaToo has prepared everything for you. No extra purchases, save your money!

Replaceable inlet and outlet: for different canister filter needs, we have prepared three different sizes of inlet and outlet heads in the box, 1/2" (12mm), 5/8" (16mm) and 20mm. you can choose a appropriate head as needed. a cleaning brush is also in the box and you can use it to clean the inside of the heater. DaToo has prepared everything for you. no extra purchases, save your money! Leading temperature control system: for the health of fish, a precise and constant temperature is very important. DaToo heater's temperature control system uses advanced stm8 chip, which ensures that DaToo has a precise and perfect temperature control over the 68 to 95 range. just set the temperature that you need, DaToo will create a comfortable environment for your beloved fish. very easy! clear and large led display, only need a light glance, you can know the current water temperature. Safe over-heat protection: DaToo aquarium external heater has two temperature sensors, one at the heater inlet and the other at the outlet. this makes DaToo heater can be more accurate to measure temperature change. when the temperature exceeds the set temperature by 0.2 , the heater immediately stops heating, the maximum to protect the safety of the lovely fish.

18
8.6
SCORE
Eheim Jager 250W TruTemp Submersible Heater 17”

Eheim Jager 250W TruTemp Submersible Heater 17”

by Prime Pet Deals - Code 2
What We like

Features shatterproof glass construction

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Product Features

  • On/off indicator light verifies heater functions
  • Includes mounting bracket and suction cups
  • TruTemp dial adjusts from 18 to 34 C (65 to 93 F)
  • Thermo safety control enables "running dry" protection

Includes mounting bracket and suction cups On/off indicator light verifies heater functions Thermo safety control enables "running dry" protection Trutemp dial adjusts from 18 to 34 c (65 to 93 f)

19
8.6
SCORE
hygger Saltwater Tank Titanium Tube Submersible Pinpoint Aquarium Heater with Digital Thermostat, IC Temp Controller 200 Watt

hygger Saltwater Tank Titanium Tube Submersible Pinpoint Aquarium Heater with Digital Thermostat

IC Temp Controller 200 Watt

by hygger
What We like

[SHATTERPROOF & ANTICORROSION]: Our Titanium Heater is completely shatterproof as there is NO glass in the construction its made from heavy duty, durable Titanium. As it has a great feature of being anticorrosion, it is perfect for freshwater, saltwater aquariums and reef tanks.

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Product Features

  • [PINPOINT TEMPERATURE]: Build-in external electronic theromstat, it has DUAL LCD display that clearly shows you the temperature setting in either Celsius or Fahrenheit. Up is aquarium temperature and down is set temperature. Heater will stop heating when temperature rise exactly to your desired temp. Heating temperature range 32 to 104F. Control accuracy is +/- 0.5 C.
  • [AUTOMATED SHUT OFF SYSTEM]: Temperature can be controlled and set to your desired degree of heat. It automatically sets off when it reached the designated temperature of your setting. Voltage: 110V
  • [TANK CAPACITY]: 200-watt aquarium heater, 10.7 inches in length. Recommended for aquariums with 20 to 45 gallons of water capacity.
  • [FULLY SUBMERSIBLE]: Our Betta Tank Heater is fully submersible in water HORIZONTALLY with 2 suction cups can be easily mounted on tank. Place it near a strong water flow so that the whole aquarium at the same temperature. Comes with a separate controller where you can easily adjust from low to high without taking out the heater from the aquarium or fish tank.

[pinpoint temperature]: build-in external electronic theromstat, it has dual lcd display that clearly shows you the temperature setting in either celsius or fahrenheit. up is aquarium temperature and down is set temperature. heater will stop heating when temperature rise exactly to your desired temp. heating temperature range 32 to 104f. control accuracy is +/- 0.5 c. [fully submersible]: our betta tank heater is fully submersible in water horizontally with 2 suction cups can be easily mounted on tank. place it near a strong water flow so that the whole aquarium at the same temperature. comes with a separate controller where you can easily adjust from low to high without taking out the heater from the aquarium or fish tank. [tank capacity]: 200-watt aquarium heater, 10.7 inches in length. recommended for aquariums with 20 to 45 gallons of water capacity. [automated shut off system]: temperature can be controlled and set to your desired degree of heat. it automatically sets off when it reached the designated temperature of your setting. voltage: 110v

20
8.5
SCORE
Uniclife Aquarium Heater Submersible with Thermometer, 300 Watt for 80 Gallon Fish Tank

Uniclife Aquarium Heater Submersible with Thermometer

300 Watt for 80 Gallon Fish Tank

by Uniclife
What We like

Red rotatable knob on top for adjusting the temperatures between ranges of 68F-93F. Visible temperature displayed allows accurate temperature maintain.

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Product Features

  • Water-tight with IP68 sealing workmanship. Fix the heater tightly to the tank in vertical or horizontal with 3 strong suction cups. Shatterproof 2 mm extra thick quartz glass prevents electricity leakage and scratching. Measures 11.2" x 1" (L x D)
  • Come with Uniclife aquarium heater x 1; Suction Cups x 3; stick-on thermometer x 1(The color of number will change to blue to indicate the temperature).
  • Ideal for 50-80 gallons fish tanks, can be installed in both fresh and saltwater.
  • Please notice the red indicator light is on while working, will automatically turn off when temperature reached. Carefully check external condition before use. Recommend testing before introduce to fish.

Water-tight with ip68 sealing workmanship. fix the heater tightly to the tank in vertical or horizontal with 3 strong suction cups. shatterproof 2 mm extra thick quartz glass prevents electricity leakage and scratching. measures 11.2" x 1" (l x d) Please notice the red indicator light is on while working, will automatically turn off when temperature reached. carefully check external condition before use. recommend testing before introduce to fish. Ideal for 50-80 gallons fish tanks, can be installed in both fresh and saltwater. Come with Uniclife aquarium heater x 1; suction cups x 3; stick-on thermometer x 1(the color of number will change to blue to indicate the temperature).

21
8.1
SCORE
Eheim - Jager 9

Eheim

Jager 9" 50 Watt submersible heater

by EHEIM
What We like

Precise temperature control

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Product Features

  • Automatic dry run shut off
  • Special shatterproof glass
  • Fully Submersible

Special shatterproof glass Fully submersible Automatic dry run shut off

22
7.8
SCORE
Encompass All Advanced 300W Digital Aquarium Heater w/Built-in Thermometer & Wireless Controller - Product Certification

Encompass All Advanced 300W Digital Aquarium Heater w/Built-in Thermometer & Wireless Controller

Product Certification

by EA
What We like

Front and rear installation mounts for freshwater and marine. Ideal for 70-90 gallons.

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Product Features

  • Patented wireless IR control allows temperature adjustments via remote.
  • Integrated sensors provide overheat and out of water protection. Fully Submersible
  • Digital thermostat and thermometer ensures precise temperature control.
  • Rugged impact resistant housing with thermal shock resistant quartz tube

Integrated sensors provide overhEAt and out of water protection. fully submersible Patented wireless ir control allows temperature adjustments via remote. Digital thermostat and thermometer ensures precise temperature control. Rugged impact resistant housing with thermal shock resistant quartz tube

23
7.3
SCORE
Eheim Jager TruTemp 300 Watt Fully Submersible UL Approved Heater

Eheim Jager TruTemp 300 Watt Fully Submersible UL Approved Heater

by Jager
What We like

TruTemp dial with readjustment ring allows the user to calibrate the heater for a precise temperatur

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Product Features

  • Thermo safety control - enables running dry protection; heater will shut off when out of wate
  • Extra long cable of 5`6
  • Made of shatter-proof glas
  • Precise temperature regulatio

Thermo safety control - enables running dry protection; heater will shut off when out of wate Made of shatter-proof glas Precise temperature regulatio Extra long cable of 5`6

24
7.1
SCORE
KEWAYO Titanium Alloy 300 W Aquarium Heater for Salt and Fresh Water, with Intelligent LED Temperature Display and External Temperature Controller + 2 Suction Cups

KEWAYO Titanium Alloy 300 W Aquarium Heater for Salt and Fresh Water

with Intelligent LED Temperature Display and External Temperature Controller + 2 Suction Cups

by KEWAYO
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

  • Vertical or horizontal installation and ensure the device is fully submerged underwater, can be used in fresh water and salt water aquariums.
  • 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.Precise temperature dial from 68 to 89F allows for complete control of aquatic climate within a 1-degree difference.
  • 300W aquarium heater is suitable for 50 to 80 gallons aquariums,Length - 12.68 inch,voltage 110-120V, power cord is 2 m/78.7 in, 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

Adjustable aquarium fish tank water heater sensitive and reliable thermostat maintains uniform temperature. automatic shut off when the temperature is reached Vertical or horizontal installation and ensure the device is fully submerged underwater, can be used in fresh water and salt water aquariums. 300w aquarium heater is suitable for 50 to 80 gallons aquariums,length - 12.68 inch,voltage 110-120v, power cord is 2 m/78.7 in, please choose the right wattage aquarium heater according to our size chart. 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.precise temperature dial from 68 to 89f allows for complete control of aquatic climate within a 1-degree difference.

25
7.1
SCORE
Orlushy Submersible Aquarium Heater 300W-Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups Suitable for Marine Reef Fish Tank Sump

Orlushy Submersible Aquarium Heater 300W-Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups Suitable 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

  • Explosion Proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.
  • It shows an area to adjust the temperature. It's not exactly accurate but it turns easy and can be adjusted at small intervals.
  • Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature. Automatic shut off when the temperature is reached
  • 300W aquarium heater is suitable for 50 to 80 gallons aquariums,Length - 11 inch,voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.

300w aquarium heater is suitable for 50 to 80 gallons aquariums,length - 11 inch,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 It shows an area to adjust the temperature. it's not exactly accurate but it turns easy and can be adjusted at small intervals.

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