Oase Pre Filter Sponges Biomaster Aquarium

60 PPI FOAM: This aquarium foam uses a 60 ppi fine grade structure, designed to capture small particles and fine debris for thorough filtration. HIGH LOAD CAPACITY: The foam's high load capacity and structural stability makes it resistant to deforming and decompression while maintaining water flow. OFFICIAL OASE PART: Specifically designed for the BioMaster and BioMaster Thermo external filters, these foams ensure an exact fit and optimal filtration without guesswork or cutting. EASYCLEAN: Made for use with Oase's EasyClean mechanism, allowing you to easily remove the pre-filter for cleaning without opening the main filter housing. Compatible with the BioMaster 250, 350, 600, and 850, and the BioMaster Thermo 250, 350, 600, and 850.