Fluval Biomax for the U2, U3 & U4

Fluval BIOMAX provides an optimal environment for the colonization and growth of beneficial bacteria. The unique bio rings have a complex pore system that provides an optimal environment where beneficial bacteria can thrive. Fluval BIOMAX also reduces and controls ammonia and nitrate. For freshwater and marine environments. For Fluval U Series Underwater Filter models U2, U3, U4