♥Adjustable flow water pump is designed fully submersible for both fresh and salt water. ♥This pump creates water flow and aerates your aquarium to simulate the natural ocean/river environment. ♥The pump is a must have accessory for aquarium, fountain and more. ♥Submersible pump for aquariums, fountains, ponds, etc ♥The flow rate is adjustable with the knob in front of the pump, Manufacturer: smallJUN