Koralia #1 12V is a low voltage, low power consumption controllable submersible pump ideal for water movement in marine aquariums. The Koralia #1 12V range is specifically designed for use connected to the Hydor Koralia Wavemaker system.Features:Minimum Flow Rate 180 gph. Maximum Flow Rate 450 gph.Minimum Power Absorbed .6 Watts. Maximum Power Absorbed 3.9 Watts.Unique Patented Magnet + Suction Cup Sup Support system that makes positioning the Koralia easy and safe anywhere in your aquariumAdjustable Flow: Rotate the pump as you prefer thanks to the sphere shaped connection and direct the flow to better suit the aquarium needsGentle or Powerful Flow: Wide and gentle or width concentrator nozzle powerful and directLow Voltage Safety: All models have a super safe rubber cords with waterproof connectors that plug into the Wavemaker control system