The Aboveground Pool Series are designed for the typical, backyard, above ground or soft-sided pools. Installation is at the return line of the pool filter. There are no settings necessary, the controller is pre-programmed. Each unit is designed to operate while the pool filter is in operation. A minimum of four hours per day of filtration cycle is required. Electrodes are designed to last up to one year of operation. No test kit is necessary. A chlorine level of .3 to .5 is required to eliminate organic materials (suntan oil, body lotion, etc).