BIOMASTER 20 PPI BLUE FILTER FOAM

The 20 ppi Filter Foam provides both mechanical and biological filtration for cleaner, healthier water for your aquarium inhabitants. This is replacement foam for the main filter unit of the BioMaster. Timing to replace the filter foam varies upon aquarium size, number of fish and plants, and declines in filter performance. We recommend replacing the foams incrementally. The 20 ppi Filter Foam includes one replacement ultra-coarse filter foam for the BioMaster Filter series. 20 ppi ultra-coarse Filter Foam provides both mechanical and biological filtration for cleaner, healthier water for your aquarium inhabitants This is replacement foam for the main filter unit of the BioMaster.  Timing to replace the filter foam varies upon aquarium size and the number of fish and plants. We recommend replacing the foams incrementally.  The 20 ppi foam is a replacement foam for the BioMaster 250, BioMaster Thermo 250, BioMaster 350, BioMaster Thermo 350, BioMaster 600, and BioMaster Thermo 600