OASE Biomaster 45PPI Pre-filter Foam Set of 6

The Pre-filter Foam Set 45 ppi for the BioMaster 250, 350, 600, or 850 and BioMaster Thermo 250, 350, 600, or 850 includes 6 fine replacement filter foams

Customize your choice of filter foams to meet the needs of your aquarium

Timing to replace the pre-filter foam set varies upon aquarium size and the number of fish and plants