External Filter Bio-Foam

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These are genuine Filter Foams for the Fluval 05, 06 and 07 External Filters. The Fluval Foam captures large particles and debris for effective mechanical filtration, which is the crucial first stage in the filtration process. Custom fit to prevent debris bypass, the foam has a pore size that allows efficient water flow with less clogging for long-lasting filtration. The foam also enhances biological filtration. A220 External Filter Foam Blocks - Suitable for 105/106/107 A222 External Filter Foam Blocks - Suitable for 205/206/207/305/306/307 A226 External Filter Foam Blocks - Suitable for 405/406/407 Show more