Lowers the amount of harsh chemicals needed to keep your pool crystal clear by up to 85%. Year Round Protection Kills algae before it grows. Simply float this device in your pool and allow the solar panel to capture the sun’s rays which will then ionize the copper core making the water an unsuitable environment for algae to live. WORKS IN ALL POOLS AND SPAS | Chlorinated or Salt Water, Above-Ground, or In-Ground Up To 35,000 Gallons Reduce Eye And Skin Irritation Caused By Chlorine And Other Chemicals – No More Burning Eyes Or Harsh Chemical Smell 100% SATISFACTION GUARANTEED !! If Your Not Happy With The Results Or Product, We’ll Refund your Purchase (30 Days).