Fluval U Underwater Filter BioMax (A495), Maximum Biological Filtration

Biological filter media improves the removal of fish waste. A large surface area allows helpful bacteria to colonize more effectively. Aids in the creation of clear, sparkling aquarium water for a healthier aquarium environment. Fits both freshwater and saltwater aquariums. Product Dimensions (cm): 3.81 x 6.86 x 26.92   Fluval BioMax creates an ideal environment for the growth of beneficial microorganisms. The bio rings contain a sophisticated pore structure that creates an ideal habitat for beneficial microorganisms to grow in. It also decreases and regulates ammonia and nitrate levels. Fluval BioMax is suitable for freshwater and marine settings and is compatible with the U series filter types U2, U3, and U4.