Oase 45ppi Replacement Pre-Filter Media Foam for all BioMaster Aquarium Filters - Blue - 6 Pack

OASE BioMaster 45ppi Pre-Filter Foam Set (6-pack) – A set of six fine-pore (45 ppi) replacement foam sponges for OASE BioMaster canister filters. These fine filter foams trap small debris and provide ample surface area for beneficial bacteria, helping maintain clear water and healthy biological filtration. Regularly replacing the pre-filter sponges ensures optimal filter performance and water quality.