- Enhances biological filtration
- Effectively captures small particles and debris
- For freshwater and marine environments
- Numerous grooves maximize the surface area for beneficial bacterial colonization.
- Adds a second layer of mechanical filtration.
2 smaller Bio-Foam pieces to fit within the compartments of the bottom basket of Fluval Canister Filters 304, 305, 306, 404, 405 & 406.