Oase BioMaster 2

Four-stage sealed canister filter with the EasyClean pre-filter that captures debris before it clogs the main media. Available in 250, 350, 600, and 850 models for tanks up to 225 gallons. Fresh and marine compatible. 3-year warranty. Also available as the BioMaster 2 Thermo with an integrated adjustable heater (66-90F) that eliminates in-tank heaters.