Oase 45 ppi Carbon Prefilter Foam Set - 4 x Medium-Density Activated Carbon Aquarium Filter Foam For Use BioMaster Series Filters

MEDIUM DENSITY: This 45 ppi foam is effective at catching debris while allowing efficient water flow, ensuring a good rate of water circulation through the prefilter. INTEGRATED CARBON FUNCTION: Unlike granular carbon, these foams combine carbon directly into the pre-filter stage, helping capture dissolved substances earlier in the filter process. 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. HIGH LOAD CAPACITY: The foam's high load capacity and structural stability helps it retain its shape even as it captures debris and carbon absorbed materials. Compatible with the BioMaster 250, 350, 600, and 850, and the BioMaster Thermo 250, 350, 600, and 850.