how to actually shock the pool?

Causes and cures for cloudy swimming pool water.
Milky pool water, white, pink, brown, purple, black cloudy water.

how to actually shock the pool?

Postby zillmiff » Thu 07 Aug, 2008 12:54

I need to shock my pool, the guys in the shop have told me 2 different things, one said i can put it straight into the pool and the other said I have to mix it with water to dissolve it before I put it in, as I have a fibreglass pool ans if I dont it will damage the fibreglass. Can anyone advise me and step by step through the process.

chem geek
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Postby chem geek » Thu 07 Aug, 2008 23:31

If you are shocking with Cal-Hypo, then you often pre-mix it in a bucket of pool water since it can be a little slower to dissolve. For chlorinating liquid, there should be no need to pre-dilute it as you can just pour it slowly over a return flow at the deep end of the pool with the pump running.

If you shock with Cal-Hypo, keep in mind that for every 10 ppm FC that it adds, it also increases Calcium Hardness (CH) by 7 ppm. If your pool water is already close to saturated with calcium carbonate, then it may get cloudy when you add the Cal-Hypo though will likely clear up within a day.

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