The Marineland Maxi-Jet Multi-Use Water Pump acts as three pumps in one - power head, utility pump and circulation pump - to power under-gravel filters, protein skimmers, calcium reactors and refugiums, as well as run small fountains. This multi-use water pump and power head includes a conversion kit to turn the power head into a prop-style circulation pump. Venturi pump allows for fully adjustable aeration. Select the proper size pump for your tank. Available in four sizes: 400 (110 to 500 GPH); 600 (160 to 750 GPH); 900 (230 to 1000 GPH); and 1200 (295 to 1300 GPH). Marineland aquarium pumps provide powerful, dependable water circulation and aeration. Versatile and easy-to-use, Marineland pumps are available in a range of sizes to handle the water flow and oxygenation needs of aquariums at rates of 100 to 1300 GPH. Features: 3 PUMPS IN 1: Marineland Maxi-Jet Multi-Use Water Pump acts as a power head, utility pump and circulation pump. MULTIPLE USES: Powers undergravel filters, protein skimmers, calcium reactors and refugiums. CONVERSION KIT: Turns the power head into a prop-style circulation pump. AERATION: Venturi pump allows for fully adjustable aeration. FOUR SIZES: Maxi-Jet 400 (110 to 500 GPH); 600 (160 to 750 GPH); 900 (230 to 1000 GPH); and 1200 (295 to 1300 GPH). Includes: 1 Water Pump Intended Pet(s): Fish Material(s): Plastic Color: Black Capacity: Aquariums 295 to 1, 300 GPH SIZE Dimensions: 2.75 in x 4 in x 8 in Marineland Maxi-Jet 1200 Aquarium Tank Water Pump and Power Head | PetSmart