The Marineland Magnum Pro filtration system delivers optimum mechanical, chemical, and classic wet/dry biological filtration. The Magnum 350 Canister Filter connects to a BIO-Wheel PRO 60 which contains over 9 miles of surface area for beneficial bacterial growth. The best filtration value available today. Includes: Magnum 350 Canister Filter, BIO-Wheel PRO 60, 2 Double Quick-Disconnect Valves and 15 oz. Activated Carbon. Filters 350 gallons per hour.