Multi-purpose controller for swimming pools, spas, hot tubs, whirlpools, water features, and other recreational bodies of water for automatically controlling water chlorination, filter pump timing, temperatures, [ actuators, ] and water management and treatment systems; electric control panel with digital displays for the complete monitoring and automation of filtration, purification, and solar heating systems of swimming pools, spas, hot tubs, whirlpools, and other recreational bodies of water; electronic controllers for solar heating system for swimming pools and spas, namely, solar powered electronic controllers for controlling the temperature of swimming pools and spas; automatic timer for controlling operation of filters for swimming pools and spas; remote control units, namely, wireless and wired controls for controlling components of swimming pools, spas, hot tubs, whirlpools, water features, and other recreational bodies of water; [ electric valve actuators; ] electronic control systems comprised of an electrolytic chlorine generator and multi-purpose controller for controlling the operation, sanitization and maintenance of swimming pools, spas and other recreational bodies of water