Sodium Hypochlorite is the chlorine disinfectant most commonly used in UK swimming pools. It's supplied in liquid form and is similar in appearance to household bleach, which itself contains approximately 5% Sodium Hypochlorite. It is possible to produce Sodium Hypochlorite on-site by passing an electrical charge through a solution of Sodium Chloride (salt water).
The benefits of this type of system are that there is
no direct handling of hypochlorite chemicals and there will be reduced amounts of chloramines (combined chlorine). Some disadvantage of the system are that it produces hydrogen gas, which is explosive and the equipment required can be expensive.
