What is a salt pool or a salt-water chlorinator?

Salt-water chlorination is a process that uses dissolved salt (2,500–4,000 ppm) as the media to generate chlorine. The chlorine generator (also known as a salt cell, salt generator, or salt chlorinator) uses electrolysis in the presence of dissolved salt, to generate chlorine. This sanitizing agent is already commonly used in swimming pools. A saltwater pool is not actually chlorine-free; it simply utilizes a chlorine generator instead of direct addition of chlorine.