The Emperor Aquatics Smart UV Sterilizer is watertight and safe to use with all types of ponds and aquariums. Each sterilizer is constructed of thick, UV resistant plastic that increases durability and longevity. All models feature quartz sleeves and lamps rated for 9,000 hours.For aquarium or pond use-For aquariums up to 125 gallons. The 125 gallons rating assumes the unit is being used as a clarifier (algae) and sterilizer-For ponds up to 2,360 gallons25 watt T5 UV lampIn lineConnections: 1.5" union inlet/ 1.5" union outletA pump is a required. The required flow rates:-Algae: 788 gph maximum, 472 gph minimum-Protozoa: 262 gph maximum, 157 gph minimumDimensions: 29" X 3"Ballast separate from unitAccessories:Emperor Aquatics 3" Mounting Bracket