Fluval Bio-Foam Pads for FX Series - 2 pk

Compatible with the Fluval FX Series (including the FX4, FX5, and FX6) High Performance Canister Filters, these Bio-Foam Pads provide exceptional biological and mechanical filtration. They feature a complex pore structure that serves as an ideal cultivation site for beneficial nitrifying bacteria. Also helps capture smaller debris and particulates that were not removed by the primary mechanical media.