The swimming pool in your backyard or condominium contains a common chemical used in your house for disinfecing and cleaning. In the past, when I was young, went weekly to the Chinese Swimming Club. Constantly the shower area would be damp and wet. But surprisingly, there is totally no greenish / black algae found anywhere in the dressing / bathing area. This is because, chlorine, the chemical used in the swimming pool kills most bacteria and it controls algae. Today, some of the cleaning liqu