2003 Submersible force pump included! Apply oxygen spray, whirpool, trinal-layer flow control and pressure methods to separate organic articles thoroughly Bilateral and flexible bracket providing cupula and screws fixing options, suitable for different kind of aquariums. Two-curved foam outlet releasing foam faster It can be used together with dripping sink outside the aquarium This product can be cooperated with ozone generator. Deliberate design, beautiful appearance and practical performance Power Head (Included $30 Value)