Fluval Nano Aquarium Filter Bio-Foam

The Fluval Nano Aquarium Filter Bio-Foam is an excellent mechanical and biological filtration that captures debris for freshwater environments. This Bio-Foam fits perfectly inside of the Fluval Nano Filter, which even eliminates debris bypass. The pore size creates efficient water flow, less-clogging and long-lasting filtration. The larger surface area promotes the proliferation of friendly nitrifying bacteria for a healthier aquarium environment.