The Hydor Koralia Nano Powerhead is the smallest of the Hydor Koralia aquarium pumps.Flow Rate: 240 gphConnections: None3.5 WattsWater flow can be directed freely with the special sphere shaped connection to the exclusive combination suction cup and magnet supportThe magnet can safely hold Koralias applied in tanks with glass (or acrylic) up to 10mm thick. The magnet is specially covered to prevent corrosion.