HeroNeo&reg; DC 3.5V - 9V 3W USB Submersible Water Pump Aquarium Fish Tank Fountain Pond Pump Flow adjustable water pump is designed fully submersible for both fresh water and saltwater. This pump creates water flow and aerates your aquarium to simulate natural ocean / river environment. The pump is a must have accessory for you fish tank, fountain and more. Submersible water pump for aquarium, fountain, fish pond, etc With 2 suction cups at the bottom and to be used in water only