Fluval FX5 Filter Foam (x 3) – A228

Fluval FX5 Filter Foam performs mechanical filtration, the crucial first stage in the filtration process. Each foam insert is custom sized to line Fluval FX5 media baskets to prevent by-pass and effectively pre-filter large particles. Optimized foam pore size provides efficient water flow with less clogging and enhances biological filtration. For use in fresh and saltwater aquarium.