Sand type filters. Recessed automatic surface skimmers. Flow through chemical feeding equipment.
Chemical disinfection is an integral part of pool water treatment.
The strong disinfecting and oxidizing properties of chlorine aid in making water bacteriologically safe, free from algae and organic matter, and aesthetically acceptable to the bather. Chlorine in the gaseous state is extremely toxic and heavier than air. Strict adherence to safety regulations is required. Chlorine gas rapidly lowers the pH of the pool water. Soda ash is necessary to maintain a properly balanced pH. f. Calcium Hypochlorite is 65 to 75 percent available chlorine bonded to a granulated calcium.