Sobo WP-50M Aquarium mini wave maker [ AC 220-240V 50/60 Hz 3W FLOW: 1000L/HR-3000L/HR] Circulation pump for aquariums . Useful to re-create natural currents in fresh water and marine aquariums. compact size , adjustable direction of water flow . High performance with minimum power consumption . It can be easily mounted with its powerful suction cup. Reliable , extremely silent and easy to maintain .