SMART UV Lite Ultraviolet Sterilizers deliver optimum protection against harmful aquarium pathogens. Available in 18, 25, 40 & 80 Watt sizes for aquariums no larger than 400 gallons (for larger aquariums see SMART UV Sterilizers, SMART HO UV Sterilizers .The best aquarium UV Sterilizer you can buy! All aquarium Ultraviolet Sterilizers are not designed equally and the proof can be seen in our SMART UV Lite models. Sterilizer size is a good starting point. SMART UV Lites are clearly larger than other UV brands because we maximize UV exposure area by positioning our UV lamp/s between the water ports. This utilizes the UV lamp to its maximum potential. The UV Lite’s watertight design protects all electrical hardware from corrosive saltwater damage. Next, our SMART Ballast operates the UV lamp efficiently while resisting failure from water damage due to a leaky seal. Lastly, we promise never to over-rate our UVs performance specifications…SMART UV aquarium water flow rates represent accurate UV doses required to successfully irradiate harmful protozoa while matching the model’s true operating capacity. Please compare our SMART UV Lite design and information to any aquarium UV competitor like Aqua Ultraviolet or GAMMA; we encourage the validation of information. If you want to purchase the best UV Sterilizer for your aquarium, consider this: Durability and features aside, SMART UV Lite models are supported by a customer service team that’s second to none. That level of quality is apparent in the long list of public aquariums, research facilities and fish hatcheries that rely on Emperor Aquatics’ UV equipment. You can view the list for yourself here on the Emperor Aquatics Company Profile and Client List page. SMART UV Lite UV Sterilizer features: Durable UV Sterilizer Body with Warranty* Safe and Efficient SMART UV Ballast Easy-to-Service Quartz Sleeve and Power Assembly Design Best UV Lamp Available Ultraviolet Safe Viewing Port Listed for Safe Outdoor and Indoor Use Choice of 3 UV Inlet and Outlet Styles