Setup, Compatibility & Care
To install, power off your BioMaster filter and close the shut-off valves. Open the canister latches and remove the filter head. Carefully lift the existing basket stack and swap the old unit for the new Oase BioMaster Top Filter Basket. Ensure the basket locks correctly onto the one below it. Compatibility is strictly limited to the BioMaster and BioMaster Thermo lines (250/350/600/850). For maintenance, rinse the basket with aquarium water only—never use soap or chemical detergents—to preserve the biological colonies living within your filter media.