Intex Krystal Clear Saltwater System for Up to 7000-Gallon Pools (Older Model) Much gentler on skin, eyes, clothes and hair than packaged chlorine Say goodbye to continuously adding chemicals to your pool water - no more ongoing expense and trips to the store Creates salt levels about one-tenth that of the ocean, so swimmers won't see, feel, or smell any salt Requires a Filter Pump with a flow rate between 700 and 4,000 gallons per hour10) 110-120 Volt 24-Hour Auto Timer for extra easy pool maintenance Much gentler on skin, eyes, clothes and hair than packaged chlorine Say goodbye to continuously adding chemicals to your pool water-no more ongoing expense and trips to the store Creates salt levels about one-tenth that of the ocean, so swimmers won't see, feel, or smell any salt Requires a filter pump with a flow rate between 700 and 4, 000 gallons per hour10) 110-120 volt 24-hour auto timer for extra easy pool maintenance