Fluval XA0239 Bio Foam for FX5-6 Canister Filter - 2 Count

2-Piece Bio-Foam Pad for Fluval FX5/FX6 Aquarium Filter Media for the Fluvial FX6 Filter | Enhances biological filtration | Effectively captures small particles and debris | 2 pack of Bio-foam Fluval Bio Foam Pads are specially designed for Fluval FX5/6 High Performance Canister Filters. Bio Foam Pads provide outstanding mechanical and biological filtration thanks to an intricate pore structure that offers a large surface area for the growth of helpful nitrifying bacteria. In addition they trap small particles that are not retained by the first stage of foam filtration.