(3 Pack) Fluval Filter Foam Block 404/405, 2 Blocks each

Fluval Foams capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration. These inserts also enhance biological filtration.

• 6 total replacement Foam Filter Blocks
• Perfectly sized for 404, 405 and 406 Performance Canister Filters
• Provides the first crucial stage in the aquarium water filtration process
• Captures large particles and debris for effective mechanical filtration and enhances biological filtration
• Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration