Fluval FX4/FX5/FX6 Bio-Foam Pad, 2 Pieces, Black

Specially designed for the Fluval canister filter Mechanical and biological filtration. Dense structure for fine particles of dirt Huge network of pores provides a wide surface for beneficial bacteria Important for efficient biological filtering. Helps keep water clean and healthy. Exclusively designed for Fluval aquarium canister filters, Fluval Bio-Foam performs exceptional mechanical and biological filtration. Bio-Foam's dense structure is very effective at trapping small particles that are not captured in the first stage of foam filtration. In addition, its intricate network of pores provides a large surface area that encourages the growth of helpful nitrifying bacteria, which is crucial for efficient biological filtration and goes a long way in creating clear and healthy water for fish and plants to thrive. Suitable for: Fluval FX4, FX5, FX6 (A214, A218, A219)