Oase 60ppi Replacement Pre-Filter Media Foam for all BioMaster Aquarium Filters - Black - 6 Pack

OASE BioMaster 60ppi Pre-Filter Foam Set (6-pack) – A set of six ultra-fine (60 ppi) foam filter inserts for the OASE BioMaster series. These extremely fine sponges capture the tiniest particles to polish aquarium water and offer a large surface for beneficial bacteria. By replacing the pre-filter foams periodically, you support superior water clarity and robust biological filtration in your aquarium.