The Hayward Aqua Trol is the affordable salt chlorine generating solution for above ground pools that saves you time and money while conveniently keeping your pool clean and safe. The AquaTrol Electronic Chlorine Generator (also known as a salt chlorinator) is designed specifically for above ground pools up to 18,000 gallons. The AquaTrol has all the same functions and features of the Aqua Rite but with a lower chlorine output. The AquaTrol also has an internal time clock for control of the pool filtration pump. Since most pumps require an outlet, the Aqua Trol control box has incorporated an outlet for the pump to plug into so that the Aqua Trol can be plugged into the outlet saving you that extra outlet space!