2 X 210 GPH Aquarium Fish Tank Submersible Pump Powerhead Undergravel Filter Max Flow Rate: 210 GPH (800L/H), H-Max (Lift height): 4.6 feet Aerating water to increase O2 level Suction cup mounting feet for either vertical or horizontal mounting Contains no seals or messy oils This submersible water pump is great for aquarium, fountains, spout and hydroponic systems.