The Hayward Aqua Trol, is the affordable salt chlorine generating solution for above ground pools. Saving 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 Aqua Trol has all the same functions and features of the Aqua Rite, but with a lower chlorine output. The Aqua Trol 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. Ensuring the Aqua Trol can be plugged into an outlet saving you that extra outlet space!