The Pre-filter Foam Set 30 ppi for the BioMaster 250, 350, 600, 850 and BioMaster Thermo 250, 350, 600, 850 includes 4 coarse 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
Available in Set of 6
Black Carbon PreFilter Foam
Red Coarse - 30ppi
Blue Normal - 45ppi
Mix (2 pieces of Carbon Black Foam, 2 pieces of Red Coarse Foam 30ppi, 2 pieces of Blue Normal Foam 45ppi)
