25 Best Filter Cartridges
for March 2021

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1
9.9
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Aqueon 06419 Filter Cartridge, Large, 12-Pack

Aqueon 06419 Filter Cartridge

Large, 12-Pack

by Central Garden & Pet
What We like

Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria

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Product Features

  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter
  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • Fits Aqueon QuietFlow Filter: LED PRO Size 20 & up and E Internal 40 gallon
  • For optimal performance, change approximately every 4 to 6 weeks

For optimal performance, change approximately every 4 to 6 weeks Fits aqueon quietflow filter: led pro size 20 & up and e internal 40 gallon Installs in seconds: align cartridge bottom key slot for an accurate fit inside the filter Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing

2
9.6
SCORE
Tetra Whisper Bio-Bag Disposable Filter Cartridges 12 Count, For aquariums, Large, Unassembled

Tetra Whisper Bio-Bag Disposable Filter Cartridges 12 Count

For aquariums, Large, Unassembled

by Tetra
What We like

CONVENIENT Easy to assemble and easy to replace

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Product Features

  • FITS TETRA WHISPER WATER FILTERS Color coded to make it simple to remember which replacement cartridge size to purchase
  • UNASSEMBLED REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear removes odors and discoloration
  • USAGE Change monthly or sooner if needed
  • CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste

Unassembled replacement carbon filter keeps aquarium water crystal clear removes odors and discoloration Catches debris dense dual-sided mesh filters debris and fish waste Fits Tetra whisper water filters color coded to make it simple to remember which replacement cartridge size to purchase Usage change monthly or sooner if needed

3
9.6
SCORE
Aqueon QuietFlow Filter Cartridge, Medium, 6-Pack

Aqueon QuietFlow Filter Cartridge

Medium, 6-Pack

by Central Garden & Pet
What We like

Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria

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Product Features

  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter
  • Fits Aqueon QuietFlow Filter: LED PRO Size 10 and E Internal 20 gallon
  • For optimal performance, change approximately every 4 to 6 weeks

Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing For optimal performance, change approximately every 4 to 6 weeks Installs in seconds: align cartridge bottom key slot for an accurate fit inside the filter Fits aqueon quietflow filter: led pro size 10 and e internal 20 gallon

4
9.6
SCORE
Aqueon QuietFlow Filter Cartridge, Small, 6-Pack

Aqueon QuietFlow Filter Cartridge

Small, 6-Pack

by Central Garden & Pet
What We like

Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria

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Product Features

  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • Fits Aqueon QuietFlow Filter: E Internal 10 gallon
  • For optimal performance, change approximately every 4 to 6 weeks
  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter

For optimal performance, change approximately every 4 to 6 weeks Installs in seconds: align cartridge bottom key slot for an accurate fit inside the filter Fits aqueon quietflow filter: e internal 10 gallon Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing

5
9.5
SCORE
Aqueon Filter Cartridge, Large, 6-Pack

Aqueon Filter Cartridge

Large, 6-Pack

by Central Garden & Pet
What We like

Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria

more infoarrow_drop_down

Product Features

  • Fits Aqueon QuietFlow Filter: LED PRO Size 20 & up and E Internal 40 gallon
  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter
  • For optimal performance, change approximately every 4 to 6 weeks

Fits aqueon quietflow filter: led pro size 20 & up and e internal 40 gallon Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing For optimal performance, change approximately every 4 to 6 weeks Installs in seconds: align cartridge bottom key slot for an accurate fit inside the filter

6
9.5
SCORE
Tetra Whisper Filter Cartridges 6 Count, Small, For aquarium Filtration (19550)

Tetra Whisper Filter Cartridges 6 Count

Small, For aquarium Filtration (19550)

by Tetra
What We like

Age Range Description: Adolescent

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Product Features

  • CONVENIENT Replacement filter cartridges are fully assembled and ready to use
  • USAGE Change monthly or sooner if there is reduced water flow
  • CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
  • CLEAN WATER MADE SIMPLE Small size fits Tetra Whisper 3i Internal Filters
  • REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear removes odors and discoloration

Replacement carbon filter keeps aquarium water crystal clear removes odors and discoloration Usage change monthly or sooner if there is reduced water flow Clean water made simple small size fits Tetra whisper 3i internal filters Convenient replacement filter cartridges are fully assembled and ready to use Catches debris dense dual-sided mesh filters debris and fish waste

7
9.5
SCORE
Aqua-Tech EZ-Change No.2 3-Pack Aquarium Filter Cartridge for 10 to 20 Power Filters

Aqua-Tech EZ-Change No.2 3-Pack Aquarium Filter Cartridge for 10 to 20 Power Filters

by Aqua-Tech
What We like

Contains AQUA-Tech Premium Activated Carbon

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Product Features

  • EZ-Change #2 Filter Cartridge fits AQUA-Tech 10-20 Power Filters
  • Changes in seconds just shake and rinse
  • For best results, change every 2-4 weeks
  • No messy assembly required

For best results, change every 2-4 weeks Changes in seconds just shake and rinse Ez-change #2 filter cartridge fits Aqua-Tech 10-20 power filters No messy assembly required

8
9.4
SCORE
Aqua-Tech EZ-Change Aquarium Filter Cartridge ( Pack Of 6 )

Aqua-Tech EZ-Change Aquarium Filter Cartridge ( Pack Of 6 )

by Aqua-Tech
What We like

Contains AQUA-Tech Premium Activated Carbon

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Product Features

  • No messy assembly required
  • EZ-Change #3 Filter Cartridge fits AQUA-Tech 20-40 and 30-60 Power Filters
  • For best results, change every 2-4 weeks
  • Changes in seconds just shake and rinse

Ez-change #3 filter cartridge fits Aqua-Tech 20-40 and 30-60 power filters Changes in seconds just shake and rinse No messy assembly required For best results, change every 2-4 weeks

9
9.4
SCORE
Marineland Emperor Power Filter Cartridge Rite-Size E, 4 Count, Replacement Cartridge For Aquarium Filtration

Marineland Emperor Power Filter Cartridge Rite-Size E

4 Count, Replacement Cartridge For Aquarium Filtration

by Marineland
What We like

age_range_description: all ranges

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10
9.4
SCORE
Top Fin Silenstream Large PF-L Filter Cartridges Refill for PF30, PF40 and PF75 Power Filters 6.5in x 4.5in - (6 Count)

Top Fin Silenstream Large PF-L Filter Cartridges Refill for PF30, PF40 and PF75 Power Filters 6.5in x 4.5in

(6 Count)

by Top Fin
What We like

ADVICE FOR USE: To help maintain a healthy aquarium, change filter cartridge every 3-4 weeks, or if water flow becomes obstructed. Remove cartridge when medicating water as carbon will absorb medications. Change out 10% of water weekly or 25% monthly. Use a water conditioner every time you add fresh tap water to your aquarium.

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Product Features

  • INSTRUCTIONS: Step 1--Remove used cartridge. Step 2--Rinse new cartridge under cool water to remove dust. Step 3--After rinsing, insert cartridge into filter chamber. Make sure cartridge fits completely into filter chamber.
  • ACTIVATED CARBON to help remove odors, pigments and organic waste
  • REFILL for Top Fin Silenstream PF20, PF30, PF40 & PF75 power filters
  • DIMENSIONS: 6.5 in L x 4.5 in W

Dimensions: 6.5 in l x 4.5 in w Instructions: step 1--remove used cartridge. step 2--rinse new cartridge under cool water to remove dust. step 3--after rinsing, insert cartridge into filter chamber. make sure cartridge fits completely into filter chamber. Refill for Top Fin silenstream pf20, pf30, pf40 & pf75 power filters Activated carbon to help remove odors, pigments and organic waste

11
9.3
SCORE
Aqueon QuietFlow Filter Cartridge, Medium, 12 Cartridges (Pack of 1)

Aqueon QuietFlow Filter Cartridge

Medium, 12 Cartridges (Pack of 1)

by Central Garden & Pet
What We like

Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria

more infoarrow_drop_down

Product Features

  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • For optimal performance, change approximately every 4 to 6 weeks
  • Fits Aqueon QuietFlow Filter: LED PRO Size 10 and E Internal 20 gallon
  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter

Fits aqueon quietflow filter: led pro size 10 and e internal 20 gallon For optimal performance, change approximately every 4 to 6 weeks Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing Installs in seconds: align cartridge bottom key slot for an accurate fit inside the filter

12
9.3
SCORE
Top Fin Silenstream PF-S Small Filter Cartridges (6 Count) Refill for PF10 Power Filters (5.5in x 3.1in)

Top Fin Silenstream PF-S Small Filter Cartridges (6 Count) Refill for PF10 Power Filters (5.5in x 3.1in)

by Top Fin
What We like

Product Dimensions: 5.5 in L x 3.1 in W

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Product Features

  • Active carbon to help absorb undesirable odors, pigments, and chlorine
  • Top Fin Silenstream Power Filters 10

Top Fin silenstream power filters 10 Active carbon to help absorb undesirable odors, pigments, and chlorine

13
8.9
SCORE
Imagitarium Replacement H Mini Filter Cartridges, Pack of 6, 6 GM

Imagitarium Replacement H Mini Filter Cartridges

Pack of 6, 6 GM

by Petco
What We like

Premium activated carbon quickly removes odor, discoloration, impurities and toxins making your water crystal-clear

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Product Features

  • Dense poly-fiber traps debris
  • Replace cartridge every 2 to 4 weeks
  • Use with Imagitarium aquariums and filters compatible with Replacement H Mini Filter Cartridges
  • Keeps your fish healthy and lively

Dense poly-fiber traps debris Replace cartridge every 2 to 4 weeks Use with imagitarium aquariums and filters compatible with replacement h mini filter cartridges Keeps your fish healthy and lively

14
8.8
SCORE
Top Fin Element Filter Cartridges

Top Fin Element Filter Cartridges

by Pacific Coast
What We like

Top Fin Element Filter 6 count

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15
8.7
SCORE
Tetra 26049 ReptoFilter Filter Cartridges, Large, 6-Count

Tetra 26049 ReptoFilter Filter Cartridges

Large, 6-Count

by Tetra
What We like

Easy to install reptofilter cartridges keep water crystal clear

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Product Features

  • Disposable filter cartridge
  • Large 6-Count disposable filter cartridges
  • Large cartridges fit the ReptoFilter 125GPH.
  • Filled with Ultra-Activated carbon which absorbs odors and discoloration

Disposable filter cartridge Filled with ultra-activated carbon which absorbs odors and discoloration Large 6-count disposable filter cartridges Large cartridges fit the reptofilter 125gph.

16
8.7
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Aqueon (2 Pack) Minibow Replacement Filter Cartridge Size Small (6 Cartridges Per Pack / 12 Total)

Aqueon (2 Pack) Minibow Replacement Filter Cartridge Size Small (6 Cartridges Per Pack

12 Total)

by Aqueon
What We like

Provide even distribution of carbon throughout; 25 percent more activated carbon

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Product Features

  • Fits Mini Bow 1, Mini Bow 2. 5 and Mini Bow 5
  • Ready-to-use; install in seconds
  • Please note: this package includes (2) bags of (6) filter cartridges
  • Replacement filter cartridge for Aqueon Mini Bow aquariums

Replacement filter cartridge for Aqueon mini bow aquariums Ready-to-use; install in seconds Please note: this package includes (2) bags of (6) filter cartridges Fits mini bow 1, mini bow 2. 5 and mini bow 5

17
8.7
SCORE
Koller Products Replacement Filter Cartridges - XS, 6-Pack, White

Koller Products Replacement Filter Cartridges

XS, 6-Pack, White

by Koller Products
What We like

HANDS STAY DRY: Easy to Install - Easy to Replace - No Need to Get Hands Wet.

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Product Features

  • PRE-ASSEMBLED - READY TO USE: No assembly required, no mess.
  • DENSE POLY-FIBER OUTER SHELL: Dual-sided poly-fiber floss removes fish waste and other debris.
  • PREMIUM REPLACEMENT FILTER CARTRIDGE: Keeps aquarium water crystal clear and your fish healthy.
  • REMOVES IMPURITIES: Activated carbon eliminates organic pollutants that can degrade water quality and cloud water.
  • KOLLER PRODUCTS & HAWKEYE AQUARIUMS: Fits Koller Products aquariums and Hawkeye aquariums using XS replacement filter cartridges. Product may ship in white SIOC packaging depending on demographic region.

Optimum filtration: for optimal filter performance replace cartridge monthly or sooner if heavily soiled and reduced filer flow. Dense poly-fiber outer shell: dual-sided poly-fiber floss removes fish waste and other debris. Koller Products & hawkeye aquariums: fits Koller Products aquariums and hawkeye aquariums using xs replacement filter cartridges. product may ship in white sioc packaging depending on demographic region. Premium replacement filter cartridge: keeps aquarium water crystal clear and your fish healthy. Removes impurities: activated carbon eliminates organic pollutants that can degrade water quality and cloud water. Pre-assembled - ready to use: no assembly required, no mess.

18
8.6
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Top Fin Filter Cartridges 2 Count (2.1 in x 1.9 in x 3.7 in)

Top Fin Element Top Fin Filter Cartridges 2 Count (2.1 in x 1.9 in x 3.7 in)

by Pacific Coast
What We like

(2.1 in x 1.9 in x 3.7 in)

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Product Features

  • With activated carbon to help remove heavy metals, odors, pigments, and organic waste.
  • ***Refill for Top Fin BF5 BETTAFLO Filter & Desktop Aquariums with Element Filters***

***refill for top fin bf5 bettaflo filter & desktop aquariums with element filters*** With activated carbon to help remove heavy metals, odors, pigments, and organic waste.

19
8.6
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Top Fin Retreat RF-S Filter Cartridges (Small) Refill for Desktop Aquariums with Small Retreat Filters - 8.1in x 1.9in (6 Count)

Top Fin Retreat RF-S Filter Cartridges (Small) Refill for Desktop Aquariums with Small Retreat Filters

8.1in x 1.9in (6 Count)

by Top Fin
What We like

6 MONTH SUPPLY

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Product Features

  • Intended For: Top fin desktop aquariums with small filters
  • Product Dimensions: 8.1 in L x 1.9 in W (20.5 x 4.8 cm)
  • Coconut shell activated carbon to help absorb undesirable odors, pigments and chlorine
  • Color: White

Color: white Intended for: Top Fin desktop aquariums with small filters Product dimensions: 8.1 in l x 1.9 in w (20.5 x 4.8 cm) Coconut shell activated carbon to help absorb undesirable odors, pigments and chlorine

20
8.5
SCORE
Koller Products Replacement Filter Cartridges - Small, 6-Pack

Koller Products Replacement Filter Cartridges

Small, 6-Pack

by Koller Products
What We like

Easy to Install, Easy to Replace, No Getting Hands Wet

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Product Features

  • Dimensions 2.38" L x .75" W x 5" H. Product may ship in white SIOC packaging depending on demographic region.
  • Specially designed to enhance filtration all the while keeping your fish in best health.
  • Dual-sided poly-fiber floss removes fish waste and other debris.
  • Fits Koller Products and Hawkeye power filters for the following aquariums: AquaTunes 2.5-gallon Aquarium with Sleep Sound Machine (B00HH7UVYO), AquaTunes 3.5-gallon Aquarium with Sleep Sound Machine (B00HH7UW1Q), AquaView 3-gallon (B01M4LNYWS), 4.5-gallon Aquarium (B01JS39E60), 5-gallon Aquarium (B00KIRR8BY), 6-gallon 360 Aquarium (B007R5C6CG), 6.5-gallon Aquarium (B0182CAHWS), 7-gallon Aquarium (B01JS2NNJA), Smart Tank 5-gallon Aquarium, Smart Tank 6.5-gallon Aquarium (B086D9B85Q), and Smart Tank 7-gallon Aquarium (B0865LG56Z).
  • Ready-to-use cartridge contains premium activated carbon that keeps water clean and fish healthy.

Fits Koller Products and hawkeye power filters for the following aquariums: aquatunes 2.5-gallon aquarium with sleep sound machine (b00hh7uvyo), aquatunes 3.5-gallon aquarium with sleep sound machine (b00hh7uw1q), aquaview 3-gallon (b01m4lnyws), 4.5-gallon aquarium (b01js39e60), 5-gallon aquarium (b00kirr8by), 6-gallon 360 aquarium (b007r5c6cg), 6.5-gallon aquarium (b0182cahws), 7-gallon aquarium (b01js2nnja), smart tank 5-gallon aquarium, smart tank 6.5-gallon aquarium (b086d9b85q), and smart tank 7-gallon aquarium (b0865lg56z). Dual-sided poly-fiber floss removes fish waste and other debris. For optimum filter performance replace cartridge monthly or sooner if heavily soiled and reduced water flow. Specially designed to enhance filtration all the while keeping your fish in best health. Ready-to-use cartridge contains premium activated carbon that keeps water clean and fish healthy. Dimensions 2.38" l x .75" w x 5" h. product may ship in white sioc packaging depending on demographic region.

21
8
SCORE
Tetra Whisper Assembled Bio-Bag Filter Medium Cartridges, 3 Count (Pack of 2)

Tetra Whisper Assembled Bio-Bag Filter Medium Cartridges

3 Count (Pack of 2)

by Tetra
What We like

Easy to Assemble, Easy to Replace

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Product Features

  • Medium 6 Count (2-Pack Of 3 Count)
  • Like the unassembled, the-Packages are color-coded, making it easier than ever to remember which size to purchase
  • Please read all label information on delivery
  • Conveniently Assembled and Ready-to-Use

Medium 6 count (2-pack of 3 count) Please read all label information on delivery Conveniently assembled and ready-to-use Like the unassembled, the-packages are color-coded, making it easier than ever to remember which size to purchase

22
7.7
SCORE
Aqueon Quietflow Internal Filter Cartridge Small 4Count

Aqueon Quietflow Internal Filter Cartridge Small 4Count

by Aqueon
What We like

Small cartridge fits QuietFlow internal filter models at10 (one) AND at 15 (two)

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Product Features

  • Activated carbon chemical filtration removes toxins, odors and discoloration
  • 4Count Aqueon replacement internal filter cartridges (2 packs of 2)
  • Dense foam mechanical filtration removes particles and debris
  • Each small size cartridge measures 3.4 x 1.4 x 5.8 inches

4count Aqueon replacement internal filter cartridges (2 packs of 2) Activated carbon chemical filtration removes toxins, odors and discoloration Each small size cartridge measures 3.4 x 1.4 x 5.8 inches Dense foam mechanical filtration removes particles and debris

23
7.4
SCORE
Coralife 2-Pack BioCube Filter Cartridge for Aquarium (3-Packs of 2)

Coralife 2-Pack BioCube Filter Cartridge for Aquarium (3-Packs of 2)

by Coralife
What We like

Removes discoloration

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Product Features

  • Keeps water crystal clear
  • Convenient 6 pack. (3) Packs of 2
  • Removes odors

Convenient 6 pack. (3) packs of 2 Keeps water crystal clear Removes odors

24
7.2
SCORE
Top Fin EF-S Element Filter Cartridge Value Pack 12 Month Supply 2.1 in X 3.7 in

Top Fin EF-S Element Filter Cartridge Value Pack 12 Month Supply 2.1 in X 3.7 in

by Top Fin
What We like

SIZE- 2.1 inches X 3.7 inches

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Product Features

  • ACTIVATED CARBON- Used to remove heavy metals, odors, pigments, and organic waste
  • REFILL-Refill for bettaflo filter and desktop aquariums with element filters
  • FULL YEAR- With each cartridge lasting a month, this 12 count pack will last you up to one full year

Activated carbon- used to remove heavy metals, odors, pigments, and organic waste Full year- with each cartridge lasting a month, this 12 count pack will last you up to one full year Refill-refill for bettaflo filter and desktop aquariums with element filters

25
7.2
SCORE
TOP PAW Dog Flowing Fountain Filter Cartridges - 4 Pack (Large)

TOP PAW Dog Flowing Fountain Filter Cartridges

4 Pack (Large)

by TOP PAW
What We like

Rinse the filter cartridge before use to help remove any loose charcoal, which is harmless to your pet. Make sure to replace cartridge monthly

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Product Features

  • Give your dog a fresh and filtered water supply that will help them maintain healthy levels of hydration
  • Duo-density filter pad captures pet hair and debris
  • Activated carbon helps remove bad tastes and odors
  • 4 filters that fit the Top Paw 300 fluid ounce Flowing Fountain

Give your dog a fresh and filtered water supply that will help them maintain healthy levels of hydration 4 filters that fit the TOP PAW 300 fluid ounce flowing fountain Activated carbon helps remove bad tastes and odors Duo-density filter pad captures pet hair and debris

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