AquaStep Ultraviolet Sterilizer For use in the following applications: Installed in a hanging position or underneath aquarium tanks to kill disease causing micro-organisms. Also use inside pond filters or skimmers to kill free floating algae. Features: Internal Step Design. Directs water back and forth across UV light tripling the contact time through the unit. Ease of Replacement. Unique 4 pin connector for easy bulb replacement without shutting down the system. Clear View Port. Allows visible light (no UV) to pass through and indicated bulb is operating. Adjustable Clamp. Spring loaded clamp creates a snug fit to any aquarium or reservoir tank. UV Bulb. Highest quality, pure hard quartz material allows maximum UV transmission and longer bulb life. Compression Coupling and Gasket. Creates water tight seal at quartz sleeve and around ballast cord. Electronic Ballast. 10W, 15W and 25W high output UL listed ballast. Versatile. Inlet and outlet at top for hang on and at bottom for below aquarium installations. Use inlet ports on each side to connect multiple units together for any size requirement. Distribution Plate. Evenly distributes water into chamber. Plugs. Plug off inlet ports not in use. Can be removed to drain or clean unit. Free Standing Base. Holds AquaStep in place for installations below or beside aquarium. Design. Innovative design creates more volume area for increased contact time. Flat side allows snug fit to any aquarium or reservoir tank. High Capacity. More capacity than any other make of equal height due to shape of chamber and step design. Water Fall. Increases oxygen level by spreading out a thin sheet of gently falling water. Adjustment Screws. Keeps unit level when installed in hanging position on tank. Injection Molded Construction. Heavy duty thick wall ABS injection molded parts. Built to last. Specifications: Inlet: 1 1/4" Slip or 3/4" FPT Outlet: 1 1/4" Slip or 3/4" FPT Dimensions: 7.5"W x 3"L x 21"H Flow Rate: Up to 450 GPH UV Wattage: 15W