Sunsun UV Filter 55W Bulb Ultraviolet Sterilizer Aquarium Algae Clarifier CUV155 55 Watts, 25" length AC 110-120V / 60Hz (USA, Canada, Japan) Suitable for ponds up to15000 gallons Inlet/outlet size: 3/4", 1", 1-1/4" & 1-1/2" Max Flow Rate:4400GPH