SunSun CUP-613 528 GPH 13W UV Sterilizer Submersible Filter Pond Pump Dimension: 12.5" L X 3.5" W X 4" H Submersible UV Sterilizer/Clarifier helps neutralize harmful micro-organisms & free-floating algae Preassembled aquarium UV sterilizer requires no additional pump or plumbing Suitable for both freshwater & saltwater & pond use 13Watt UV, 528GPH