Converting your swimming pool to a salt chlorination-based salt water swimming pool is a wise move. Salt chlorinators have long been popular for backyard pools, and ChlorKing has scaled up this proven, environmentally friendly technology for commercial pools and spas. They use a proven 200-year-old technology, electrolysis, to convert salt to free chlorine to sanitize the water. In modern commercial pools, small amounts of salt are added to pool water, which then passes over a series of plates charged with low-voltage electricity to produce the chlorine. Commercial systems produce 2 to 28 pounds of chlorine per day to sanitize pools ranging in size from 2,500 to 1,000,000 gallons.