Jebao UV Clarifier Sterilizer for Aquarium Fish Pond Fountain;

Tackle heavy pond algae blooms with safe, cleansing ultraviolet light. Makes it simple to achieve clean, clear pond water all season long. High performance UV bulb ensures professional power while ease of installation and maintenance make it the right unit for new or existing ponds or water gardens. Included 3/4", 1", 11/4 and 11/2" fittings. For peak performance, ultraviolet clarifier bulb should be replaced after 8,000 hours (about once every 11 months of operation).