Pond Boss® 9 Watt UV Pond Clarifier is ideal for use in ponds up to 2,000 gallons. The UV clarifier provides water clarification by helping to clear the green out of the water and prevent nasty odors. This UL listed clarifier helps balance the pond and maintain clean water by using Ultraviolet technology to reduce the need for chemicals and to improve water quality. The energy efficient 9 watt bulb lasts up to 8,000 hours and should be changed every 12 months. Pond cleaning and maintenance is easy with the pond boss® 9 watt UV Clarifier. Cleans the green out of water Uses ultraviolet technology to clean pond water. Helps balance the pond and maintain clean water. For use with ponds up to 2,000 gallons Helps keep fish healthy. Prevents nasty odors and murky water 9 watt UV bulb lasts up to 8,000 hours. Continuously improves water quality. Energy efficient Fits 1/2, 3/4, and 1 in. ID tubing (tubing not included). 15 ft. cord length UL listed.