Wattage: 4.5 Watt - Flow Rate: 900 l/h Freshwater tank: from 60 to 100ltr - Marine tank: from 36 to 60ltr . The new Hydor Koralia Evolution is compact, energy saving , controllable and with amazing never seen before performance! The exclusive, patented, magnet-suction cup support has been improved becoming also a vibration-absorbing device. The new shaft-less impeller technology guarantees guarantees up to 20% more water flow with up to 50% less power consumption! Available in 3 models from 2800 to 5200 l/h (750-1400 gph), 4 to 5.5W! Product characteristics at a glance. Vibration Absorbing Device - The new improved design makes the magnet suction cup support an vibration-absorbing device. Unique Impeller Design - Wide and gentle flow. Sphere Joint - Adjustable flow directions. Magnet Suction Cup Included - Free positioning. New Impeller Technology - Shaft-less. Controllable - Can be connected to a timer (not included), and can work on intervals of seconds, minutes or hours. New Design - Smaller. Energy Saving - 50% Less power consumption, up to 20% more water flow. Comes with a 2 Year Guarantee The Hydor Koralias are a new innovative range of circulation pumps for aquariums. The exclusive Hydor design and technology guarantee a continuous and powerful water flow which can be directed freely thanks to the special sphere shaped connection to the exclusive combination suction cup and magnet support. High performance, low energy consumption, quick and easy maintenance. Designed to be super efficient and long-lasting with very low energy consumption compared to traditional circulation pumps. Adjustable flow direction! The special sphere shaped connection makes flow directing quick, simple and fully adjustable. The magnet can safely hold Koralias applied in tanks with glass (or acrylic) up to 15mm thick. High performance, low energy consumption! Unique patented* impellers designed by Hydor guarantee exceptional hydraulic performance with low energy consumption.