Hydor Koralia Evolution 750 GPH (45 watts) used to be Hydor Koralia 2 UL 600 GPH (9 watts) is a new innovative range of aquarium circulation pumps. This pump's water flow is at the same time powerful and delicate making it ideal for marine and reef tanks. Features: Unique patented magnet + suction cup support included Incredible stability in any position in aquariums with glass up to 15mm thick. Magnet is specially covered to prevent corrosion. Adjustable flow direction The special sphere shaped connection makes flow directing quick, simple and fully adjustable. High performance, low energy consumption Unique patented impellers designed by Hydor guarantee exceptional hydraulic performance with low energy consumption. Fresh water tanks from 50 to 90 gal Marine water from 30 to 50 gal Int. patent pending 115V 60Hz Model Flow Rate Power Absorbed Koralia 750gph 45W. Note: Hydor Koralias are not intended for use with wave makers.