Hayward Goldline AQ-TROL-HP AquaTrol Above-Ground Swimming Pool Salt Chlorination System Quick and Easy 30 minute installation The best water quality attainable soft silky feel  no more red eyes or dry skin always crystal clear and ready for swimming Digital salt display and 7 diagnostic indicators Selectable super chlorinate function 24-hour timer for filter pump control allows multiple pump periods per day program in 15 minute increments manual switch (On-Auto-Off)