The Aqua Trol Salt System with Twist Lock cord also has an integral time clock for control of the pool filtration pump. Since many above ground pools already have a single electrical outlet for the filter pump, the Aqua Trol is designed with an outlet (timer controlled) for the filter pump to plug into, the Aqua Trol then plugs into the original outlet the filter pump was using. The savings on chlorine and electrical power alone (if the pump was previously running 24 hours), will have the Aqua Trol paying for itself in just a few short years. The Aqua Trol system typically installs in less than 30 minutes and is very easy to operate.