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What is SHOCKING the pool or spa, and when should it be done?

April 26, 2017pool shocking spa

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What is SHOCKING the pool or spa, and when should it be done?

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SHOCKING (or SUPERCHLORINATING) the pool or spa water is a process of increasing the amount of free chlorine residual to a level 10 times greater than the amount of chloramines in the water. Typically, that translates to a level of 10 ppm. This process oxidizes all of the organics in the water. Shocking the pool is a good idea when: there are complaints of strong chlorine smell, after very heavy use, or after a heavy rain event.