The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process Commonly used dechlorinating agents include activated carbon and sulfur dioxide
At times, either by operator error or equipment malfunction, the pool may have suffered from the addition of too much chlorine Dechlorination is the procedure whereby the chlorine is chemically reduced by the addition of a chlorine destroyer such as sodium thiosulphate Dilution of the pool is the recommended and quicker method of returning the pool to safe bathing conditions