Shock chlorination
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Shock chlorination is a process used in many swimming pools, water wells, springs, and other water sources to reduce the bacterial and algal residue in the water. Shock chlorination is performed by mixing a large amount Sodium hypochlorite, which can be in the form of a powder or a liquid such as chlorine bleach, into the water. Water that is being shock chlorinated should not be swam in or drunk until the sodium hypochlorite count in the water goes down to three ppm or less. Never mix commercial sodium hypochlorite and commercial calcium hypochlorite. The result may end in an explosion.
[edit] Warning:
Never mix any two chemicals, unless the manufacturer's labeling specifically instructs to do so. Only use products from manufacturers you trust.
See also: chlorination
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