Hydor Koralia Nano Aquarium Circulation Pump, 240, 425, 565 GPH In a world where nan tanks rule, hydro introduces a more powerful nan pump added to the koala nan line, with an Output of 565 GPH, it delivers more flow than any koala nan before! it can be used with any on/off timer or controller to create desired flow patterns and beneficial water movements in the Aquarium Includes patented magnet-suction Cup support for easy positioning Manufactured in Italy