Odyssea UV sterilizer is a non-submersible UV system is simple to install in any pond, water feature or aquarium and it provides fish with a year-round safe environment. The UV-36W handles up to 90 gallons tank. Measures 9" x 3" . Hang on or in-line use Continuous operation 18W-120V 60Hz Treats up to 180 gallons aquarium We also produce Odyssea UV Sterilizer 9w & 18w Ultra Violet Sterilizer 9w(Suitable for up to 350 liters aquariums) Ultra Violet Sterilizer 18w(Suitable for up to 700 liters aquariums)