You let the water’s pH to go above the 8.0 mark. When pH level reaches 8.5, chlorine is only about ten percent active, whereas it is 73 percent active when the level is at 7.0. The higher the activity of chlorine, the cleaner the pool water will be.

Mechanical energy such as diving, jumping and splashing of swimmers removes chlorine too.

During the hot summers and the resulting high water temperatures expect your chlorine bill to zoom sky high.

If it be true that one swimmer contaminates about 600 gallons of water and one dog is equivalent to 50 swimmers, then shead a tear for a public pool whose 20,000 gallon pool accommodates more than 125 people a day.

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