Water level controller with just one sensing unit for nano aquariums or small aquariums with up to 200 litres (55 USgal.), placeable into cupboard filter systems or on the advantage of the fish tank. Scope of shipment: ready for installment with 11V power supply, low-voltage metering pump, 3m (118 inch) hose pipe, magnet owner for approximately 10mm (0.39 inch) glass density as well as a defensive cover for the sensing unit.