Upgrade your water clarity with the enhanced 20W UV Pond Clarifier, designed for ponds, aquariums, swimming pools, and cold plunge systems up to 1000 gallons. This UV light helps break down algae and organic impurities, restoring clean, clear water naturally without harsh chemicals. Enhanced 20W UV Light – Compared with traditional 18W models, the upgraded UV light delivers stronger light penetration for faster results. Ideal for koi ponds, fish tanks, and outdoor pools that need consistent water balance. Stable Underwater Placement – Dual sealing with thickened end caps ensures waterproof reliability. The added gravity block keeps the light upright underwater, allowing 360° uniform illumination and better cleaning coverage. High Transparency Quartz Tube – The premium quartz glass maximizes UV light transmission while maintaining durability under prolonged use. It works efficiently below 30°C (86°F), ensuring both safety and long lifespan. Extended Reach for Flexible Installation – Comes with a 55inch power cord to fit a wide range of setups, from indoor aquariums to large outdoor ponds or spa systems. Connect easily to your existing filtration or circulation setup. Recommended Use For best performance, operate 1-2 hours per day to maintain clear and balanced water. Whether for a koi pond, cold plunge, or swimming pool this 20W UV pond light offers an energy efficient way to enjoy clean, sparkling water year round. Winding risk may exist, please keep our product away from children