SunSun CUV-172 72W UV Light Sterilizer Pond Water Clarifier Power: 72W (2 x 36W) Suitable for pond sizes up to 15850 gallon For use with pumps up to 1585gph Lenght: 98cm / 38.5" Voltage: 110-120V 2 x 36W UV Bulbs Included Suitable for Marine and Freshwater