hygger 20W Pond U-V Light Clarifier for 100–1200 Gallons, 254nm Dual-Tube Water Clarity Enhancer, Submersible Aquarium U-V Light for Koi Pond, Large Fish Tank, Pool, Spa, Cold Plunge

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Pond Water Clarifier U-V Light, Make Your Water Clean Please place the U-V lamp in the filter box correctly. The circulating water flows to achieve the best cleaning effect. Do not place it directly in fish ponds or fish tanks. U-V light is harmful to both humans and fish. Please do not have direct contact with the light source for a long time. 99.9% quickly clean water 254nm is the most efficirnt wavelength to clean water Cloudy Aquarium Water Into Super Clear It will take several days to clean the green algae and gradually make your water clear Submersible & Self-Sinking Design Built-in weighted base allows the U-V light to sink automatically for effortless setup Dual-Tube Pond U-V Light Double tube design and 42mm larger diameter glass tube, brings double water purification capacity, making pond water cleaner. If green water suddenly appears, keep it on continuously for 2–3 days, then return to intermittent use. Avoid 24-hour operation to prevent shortening the lamp’s lifespan. Not suitable for acrylic tanks, as U-V may cause material deterioration or crackingg