The Aqua Medic EVO 1001 is a motor driven, adjustable external protein skimmer with controller for marine water aquaria up to 500 litres of water. The venturi pump draws water out of the aquarium or filter chamber, mixes it with air in the pump housing which is then cut into small air bubbles by the Aqua Medic 3D needle wheel. This water/air mixture is then pumped into the reaction pipe where organic substances are taken up by air bubbles. Foam is formed and pushed into the foam cup. The purified water leaves the skimmer via outlet and is directed back to the aquarium or filter sump by the discharge.The Aqua Medic EVO 1001 is designed for installation in any mode: as a -hang on-, it is simply hung over the edge of the aquarium. Only the venturi pump is inside the tank. The power-saving and efficient pump Aqua Medic DC Runner 1000 serves as a venturi pump (incl. DC motor) with power consumption of max. 12 watt. Polished ceramic bearings and shafts for brilliant silent performance and a