Replacement Bio-Foam Cartridge for Fluval 207/307 Filters – 2-pack (sponge media)

Replacement Bio-Foam Cartridge for Fluval 207/307 Filters – 2-pack (sponge media) provides two sponge filter inserts engineered to fit Fluval 207 and Fluval 307 canister filters. These replacement sponge media combine mechanical and biological filtration: they trap solid debris while offering a porous surface for colonization by beneficial nitrifying bacteria. Intended for use in freshwater and planted aquariums, the set restores filter flow and maintains filtration efficiency after routine maintenance.

Advantages

The two-piece Bio-Foam set is designed as a direct physical replacement for the original sponge inserts, simplifying media changes without modifying the filter. The porous foam captures particulate waste, reducing cloudiness, while its open-cell structure increases surface area for biofilm development and biological filtration. Using matched replacement media helps maintain consistent flow rate and prevents short-term performance drops that can occur when alternative materials are used.

Suitable for

• Routine media replacement in Fluval 207 canister filters
• Routine media replacement in Fluval 307 canister filters
• Freshwater community and planted aquariums requiring mechanical and biological filtration
• Maintenance intervals where sponge inserts are replaced or refreshed

Key specifications

• Contents: two sponge (bio-foam) cartridges
• Function: combined mechanical and biological filtration
• Compatibility: designed to fit Fluval 207 and Fluval 307 canister filters
• Suitable aquarium type: freshwater and planted tanks

How to use

Remove the canister filter top and access the media baskets following the filter manufacturer's maintenance instructions. Take out the used sponge inserts and rinse the new Bio-Foam cartridges in tank water to remove loose particles and avoid killing beneficial bacteria with chlorinated tap water. Insert the replacement sponges into the media baskets in the same orientation as the originals, reassemble the canister, and restart the filter. Check for normal flow and inspect for leaks after installation.

Usage recommendations

Replace sponge cartridges during scheduled maintenance intervals or when visibly clogged; inspect sponges monthly and rinse in aquarium water as needed to maintain flow without removing established beneficial bacteria.