Best Carbon Aquarium Filter Cartridges in 2026

REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear – removes odors and discoloration

CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste

CONVENIENT Replacement filter cartridges are fully assembled and ready to use

🐟 25% MORE ACTIVATED CARBON - Aqueon Replacement Filter Cartridges are dual-sided, featuring dense-floss with over 25% more activated carbon than the leading brands.

🐟 HIGH-QUALITY ACTIVATED CARBON - The cartridge contains high-quality activated carbon that keeps water clean.

🐟 EVEN CARBON DISTRIBUTION - Aqueon’s patented cartridges were designed to ensure the even distribution of activated carbon.

REPLACEMENT FILTER CARTRIDGE: Pack of 6 fits Marineland Penguin PRO Power Filters 275 and 375; also fits original Penguin Power Filters 200 and 350.

EASY TO INSTALL: Pre-assembled cartridges slide easily into place, providing mechanical and chemical filtration and making replacement fast, dry and effortless.

THREE-STAGE FILTRATION: Mechanically filters water through a pad of double-thick poly fiber.

POLISHING FILTER PADS: Helps to ensure a clean and healthy aquatic environment.

MECHANICAL FILTRATION: Screens out fine particulates to promote increased water clarity.

FOR USE WITH: Fits Marineland C-Series and Magniflow Canister Filters (see packaging for sizing details).

Replacement: Marina Slim Filter Bio-Carb is a genuine replacement cartridge for all three Marina Slim Filter Models (S10, S15, S20).

Ideal Usage: Ideal for tropical fish, the filter cartridge contains activated carbon and Ceramitek for optimum filtration and a healthy aquarium.

Helpful Filtration: The activated carbon effectively removes pollutants and odors from your aquarium water. Ceramitek, a highly porous ceramic biological filter medium, optimizes biological filtration.

REPLACEMENT CARBON FILTER: Keeps aquarium water crystal clear, healthy and polished – activated carbon removes odors and discoloration.

CATCHES DEBRIS: Layers of multi-density floss effectively trap even the smallest particulates.

FOR TETRA WHISPER EX POWER FILTERS: Available in medium and large sizes to fit the range of Tetra Whisper EX Filters.

Chemical filter media with two unique filtering sides that combine to provide thorough chemical filtration

Polyester side filters out fine debris and contaminants

Carbon side filters out harmful liquid substances, colorants and odors

Replacement filter cartridges with a combination of carbon and zeolite

Chemical filter media removes pollutants and odors from aquarium water

Improves color and clarity of water and provides a healthy environment for your fish

REMOVES DEBRIS: Dual-sided poly-fiber floss removes fish waste and other debris quickly.

FULLY ASSEMBLED: Ready-to-use cartridge contains premium activated carbon that keeps water clean and fish healthy.

OPTIMUM PERFORMANCE: For optimum filter performance replace cartridge monthly or sooner if heavily soiled and reduced water flow.

Usage: Marina T100 Replacement Aquarium Filter Cartridges are for use with all Marina 3.7 L (1 US Gal.) aquariums, including the Marina Pirate Aquarium Kit and the Marina Mermaid Aquarium Kit.

Quality Filtration: Marina replacement filter cartridges have a combination of carbon and zeolite for efficient filtration.

Keep Water Clean: Chemical filter media removes pollutants and odors from aquarium water.

REPLACEMENT FILTER MEDIA: These Activated Carbon Cartridges are specially designed for the Cascade 300 Fully Submersible Internal Filter (CIF1), and serve as a replacement for when it’s time to cycle out aquarium filter media.

CHEMICAL FILTRATION: In addition to absorbing ammonia, nitrites, nitrates, and phosphates in a timely manner, these Activated Carbon Cartridges also remove harmful chemicals and toxins, clear up discolorations, and reduce foul odors from your tank.

TOP-QUALITY ACTIVATED CARBON: These Activated Carbon Cartridges come together in a 2 Pack. For best results, replace cartridges every 4 to 6 weeks. With that said, they are refillable, allowing you to customize filtration based on your aquarium’s needs.

Replacement filter cartridges provides mechanical, biological, and chemical filtration

Polyester foam traps fine debris; carbon removes pollutants and odors; and zeolite eliminates toxic ammonia

Improves color and clarity of water and provides a healthy environment for your fish

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

Strong Compatibility: The specific size of our aquarium filter cartridge is 2.1 in L x 3.7 in W. It is very suitable for Top Fin BF5 BETTAFLO FILTER & DESKTOP AQUQRIUMS. With this aquarium filter cartridge, you can keep your water healthy every moment. It contains 6 pack aquarium filter cottons, which you can change every 2-4 weeks.

Excellent Filtration Performance: The filter cotton is made of cotton and carbon and has 3-layer filtering effect, which can filter and absorb 99% of the sundries to fish, so as to keep the water source clean and the healthy growth of fish.

Long-term Replacement of the Aquarium Filter: According to the test, the filter cotton has already withstood too much sundries for no more than four weeks, so you need to replace it with a new one to keep the water source healthy and clean at all times. Suggest to change filter cartridge every 2-4 weeks.

(3 of Each) Marina Slim Filter Carbon Plus Ceramic Cartridges and Zeolite Plus Ceramic Cartridges

Carbon Plus Ceramic Cartridges - Absorbs toxic ammonia and reduces fish stress

Carbon Plus Ceramic Cartridges - Effectively removes pollutants and odors

Dense poly-fiber traps debris

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

Use with Imagitarium aquariums and filters compatible with Replacement H Mini Filter Cartridges

Whisper Bio-Bag Cartridges complete the Whisper 3i In-Tank Filter for a clean, easy-to-maintain aquarium

Filled with Ultra-Activated carbon, ready to use disposable single packs remove waste particles, odors and discoloration, and are easily changed once a month

Small Size, 2-pk assembled

REPLACEMENT CARBON INSERTS: This aquarium filter media is a replacement for filter pads in your Aquatop FORZA Series canister filter.

KEEP CRYSTAL CLEAR WATER: These tank filters are great for your filtration system and will help keep your aquarium water crystal-clear.

FITS AQUARIUM CANISTER FILTERS: These fish tank filter pads are pre-cut to fit Aquatop’s aquarium filter FZ9 UV for both fresh and saltwater tanks.

【Compatible】: Aquarium Filter Cartridge Compatible with Aqua-Tech EZ-Change # 2 Aquarium Filter,fit for 10-20 power filters.Size : 4.5 x 4.7x 6 inch

【High quality Activated carbon】：Activated carbon can prevent odor, water discoloration and impurities from your aquarium,provide clean and fresh water for healthier fish.

【Strong adsorption】：Contains Premium Activated Carbon, which can capture fine particles or dust in the water,removes the odors, water discoloration and impurities

Strong Compatibility: The specific size of our aquarium filter cartridge is 2.1 in L x 3.7 in W. It is very suitable for Top Fin BF5 BETTAFLO FILTER & DESKTOP AQUQRIUMS. With this aquarium filter cartridge, you can keep your water healthy every moment. It contains 12 pack aquarium filter cottons, which you can change every 2-4 weeks.

Excellent Filtration Performance: The filter cotton is made of cotton and carbon and has 3-layer filtering effect, which can filter and absorb 99% of the sundries to fish, so as to keep the water source clean and the healthy growth of fish.

Long-term Replacement of the Aquarium Filter: According to the test, the filter cotton has already withstood too much sundries for no more than four weeks, so you need to replace it with a new one to keep the water source healthy and clean at all times. Suggest to change filter cartridge every 2-4 weeks.

【Package Includes】: 9 pieces of fish filter cartridges, makes for AQUA-Teach 20-40 & 30-60 power filters (EZ-Change#3) & Marineland Penguin PRO Power Filters 275/375 & Original Penguin Power Filters 200 350 - Rite-Size C.

【Full filtration】The filter cartridge has dense filter cotton, which can adsorb all kinds of debris and fish excrement, and the grid design of the fish tank filter cartridge makes full contact between the activated carbon and water to achieve maximum deodorization and water purification, thus giving your lovely pet a fresh and comfortable living environment, and also saving you the time of manually cleaning the fish tank.

【Ready to use】Our filter cartridge is already set up, it just needs to be installed correctly on the power filter and it is ready for quick filtration. If there is carbon on the filter cotton, please clean it before use.

Activated carbon impregnated filter pad effectively traps large particles, removes discoloration, odor, pollutants, and harmful chemical to keep your aquarium crystal clear

DIY Cut-to-fit filter pad, good to use in freshwater and saltwater aquariums

Works with all filters: canister, hang-on filter, wet/dry, pond filters, DIY filters

REFILLABLE WATER FILTER CARTRIDGE – Ideal refillable water filter cartridge for DI Resin, Carbon, and other media for aquariums and water purification systems. Reusable water filter cartridge, an environmentally friendly option.

10-INCH STANDARD SIZE – 10" x 2.5" water filter cartridge that fits standard 10-inch cartridge housings. Designed with a Twist-On Cap with a Sponge insert that prevents the filter media from flowing out.

EASY VIEW TRANSLUCENT HOUSING – The translucent housing of this refillable filter cartridge allows for easy detection to know when it’s time to replace the media inside. When it’s exhausted, simply refill the cartridge with new media.

10 total disposable carbon cartridges

Filled with high-grade, activated carbon filter media

Disposable Carbon Cartridges keep aquariums sparkling clean

💦【Aquarium Filter Cartridge #2】: Aquarium filters, replacements for EZ-Change brand No.2 aquarium filter, fit for 10-20 power filters. Size :4.3 x 4.7 x 6.0 in.

💦【High quality activated carbon】：Offer efficient and long-lasting filtration performance,Our high quality activated carbon aquarium filter is durable and long lasting, it offers clean and fresh water for fish, make the fish more healthier.

💦【Function】:The aquarium filter traps fine dust,cleans the water to a crystal clear condition,and keeps the fishy smells away from your house when there is a tank.

🐋🐋【Strong Compatibility】: Umlecoa Rite-Size C replacement filter cartridges are designed for MarineLand Penguin Power Filters, perfect compatible with Marineland Penguin PRO Power Filters 275/375 & Original Penguin Power Filters 200/350. It‘s great choice for your MarineLand Aquarium Penguin Power Filter.

🐙🐙【Quick Installation】: Rinse the new filter cartridge under cool water to remove carbon dust, align the cartridge bottom key slot, insert the filter cartridge into the filter chamber, and make sure the filter cartridge fits completely into the MarineLand Penguin Power Filter chamber.

🐢🐢【Excellent Performance】: Ready-to-use cartridges for MarineLand Penguin Power Filter are made of high-quality cotton and coconut shell activated carbon, triple water filtration effect. Keep your aquatic organisms healthy every moment.

🐟【Top Fin Compatible Filter Cartridge】This filter cartridge is suitable for Top Fin filter and perfectly matches Top Fin Silenstream Power Filters PF10.The specific dimensions of the filter element are 5.5 in L x 3.1 in W inches.With this aquarium filter cartridge, you can always maintain healthy water quality.

🐟【Excellent Filtration Performance】After many scientific tests, the high-quality cotton and activated carbon contained in this filter Cartridges can filter and absorb harmful bacteria and debris from fish and plants, and its filtration performance is three times that of other brands, more Effectively keep water clear and healthy, thus protecting your fish and other creatures.

🐟【Replace Filter Element in 2-4 Weeks】Research shows that after 2-4 weeks of filtration and absorption, the filter cotton will fully absorb and filter the impurities in the aquarium. For the health of your fish and other creatures, you will need to change your aquarium filter cartridge every 2-4 weeks to keep your water source healthy and clean.

🐋🐋【𝐒𝐭𝐫𝐨𝐧𝐠 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲】：The type of our aquarium filter cartridge is XS, and the specific size is 2.9 x 1.8 x 0.3 inches. Extra Small filter cartridges can perfect compatible with Aqueon QuietFlow Fitler E Internal Power Filter Size 3.

🐙🐙【𝐐𝐮𝐢𝐜𝐤 𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧】：Easy installation using the "FRONT" orientation tab. Rinse the new filter cartridge under cool water to remove carbon dust, align cartridge bottom key slot, insert the filter cartridge into the filter chamber, make sure the filter cartridge fits completely into the Aqueon filter chamber. Keep your aquatic organisms healthy every moment.

🐢🐢【𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐭 𝐅𝐢𝐥𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞】：Ready-to-use cartridges for Aqueon filter are made of high-quality cotton and activated carbon, triple water filtration effect, richer in probiotics, which can reduce heavy metals, absorb harmful bacterial impurities. With this aquarium filter cartridge for Aqueon, you can keep the water source clean and the healthy growth of fish.

Note:Fits for JackSuper waterfall filter only,Clean water with Whisper Technology

Filter cartridges replacement for Jacksuper turtle filter 3W

Replace or clean filter cartridges every two weeks or sooner for optimal performance.

1 box contains 2 Power Filter Cartridges that fit the Finnex PX-150 Power Filter Canister and other brands

Cartridges are equipped with carbon

Can also be used with other similar canisters