Jebao 18W UV Clarifier Sterilizer Koi Fish Pond Tank Aquarium 18 Watts UVC Light AC 110-120V / 60Hz 18 Watts Recommend flow rate 2200gph Suitable for ponds up to 4400 gallons or 200 gallons aquarium Inlet/outlet size: 3/4", 1", 1-1/4" & 1-1/2" 22 ft cord and sealed plug