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. The magnet can safely hold Koralias applied in tanks with glass (or acrylic) up to 15mm thick.