Oase 30ppi Replacement Pre-Filter Media Foam for all BioMaster Aquarium Filters - Orange - 6 Pack

OASE BioMaster 30ppi Pre-Filter Foam Set (6-pack) – A six-pack of coarse-pore (30 ppi) foam sponges for the OASE BioMaster canister filters. These coarse pre-filter foams capture larger debris and help prolong the life of finer filter media, while also offering additional surface for biological filtration. They form part of the BioMaster’s multi-stage filtration system and should be replaced periodically based on your aquarium’s load to ensure optimal water clarity.