With the Marineland Maxi-Jet Water & Circulation Pump， you get three pumps in one. It’s fully convertible as a power head， utility pump and circulation pump for a variety of freshwater and marine uses. It’s perfect for operating under-gravel filters， wave-maker timers， small fountains， calcium reactors and skimmers. Use the included conversion kit to turn the power head into a prop-style circulation pump to get more water movement in your aquarium while using the least amount of energy. The Maxi-Jet is easy to attach to your tank with the secure suction cup mount.