This is a vacuum U-V Lamp--Replacement Light Tube, which emits germicidal shortwave with a peak at 253.7nm wavelength to help effectively remove algae, and eliminate virus, bacteria and other germs in water. It can be used in ultraviolet sterilizers for aquarium fish tank and pond. In order to keep a good performance and effect to your water, we recommend you replace the bulb annually. We do not sell SunSun GRECH Jialu brand lamps. All SunSun GRECH Jialu brand names, trademarks and logos are property of the owner.
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