About This New and improved vibration absorbing magnet and suction cup support. Can safely hold the Koralia Evolution 850 positioned in tanks with glass (or acrylic) up to 1/2" thick. New shaft-less impeller technology with flow rate of 850 gph, ideal for tanks from 50 to 100 gallons, fresh or marine water Power absorbed: 5 Watts. 50% less power consumption and up to 20% more water flow when compared to previous Koralia models Sphere joint: adjustable flow direction Smaller design than older style Koralia pumps with similar flow rates, includes cable protector and is ideal to use in tanks with urchins, puffers, parrot fish and triggers Overview Brand : Hydor Color : Black Material : cotton Style : 750-850 GPH Product Dimensions : 7.01"L x 4.02"W x 7.01"H Power Source : Ac/dc Item Weight : 1.2 Pounds Maximum Flow Rate : 3217 Liters Per Hour Voltage : 115 Volts Horsepower : 5 Watts