Marineland brand is the world?s leading brand of innovative equipment and environments for consumers wishing to create the ultimate aquatic showcase. Committed to fishkeeping success for over 40 years, the brand is the professional?s choice for commercial display systems and scientific research. Whatever you?re passionate about ? freshwater or saltwater, big or small, beauty or science ? make your aquarium your own.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.