Fluval FX5 Aquarium Filter Foam Block 3.5" length x 4.8" width x

Capture large particles and debris with the Fluval FX5 Aquarium Filter Foam Block for an effective mechanical filtration, the crucial first stage in the filtration process. The Fluval FX5 Aquarium Filter Foam Block is custom fit to prevent bypass, it has a pore size that allows efficient water flow with less clogging for long-lasting filtration. The Fluval Aquarium Filter Foam Block can be used for fresh or marine water aquariums.