Solaxx CLG10A Saltron Retro Self Cleaning Salt Chlorine Generator with Built In Timer for Inground and Aboveground Pools Up To 20,000 Gallons. Saltron Retro is a salt chlorine generator for in-ground and above ground swimming pools up to 20,000 gallons that requires no plumbing or electrical contracting work to install. Perfect for after-market installation. This self-contained purification system utilizes a natural process to generate pure chlorine. The electrolytic process uses a ..