PH with Liquid chlorine

cledee · Jun 18, 2022

This will probably need to go in the agree to disagree section, but my question is if Liquid chlorine has a PH between 11-13 and you are keeping your pool Chlorinated between 4ppm and 8ppm depending on your CYA wouldn't the PH be slightly affected by Chlorine since you are always keeping your pool Chlorinated around those ranges. So for example if your pools PH is 7.2 without Chlorine but then you add enough for 4ppm-8ppm, wouldn't your PH be higher after the chlorine addition and going forward since you are maintaining that range?

Endro32 · Jun 18, 2022

So, yes and no. The initial addition of liquid chlorine does in fact raise the pH of the water, but as it is used up in the water the pH comes back down such that the net effect of adding bleach is zero.

So if you maintain the FC level using liquid chlorine, because you're adding bleach as it is being used up, your pH will remain virtually unchanged by the chlorine. It will probably drift, though, due to other factors like outgassing.

an1vrsy · Jun 18, 2022

I am no chemist, but I have stayed at a Holiday Inn. No never mind that attempt at being funny.

I do believe and through years of adding LC that a full gallon, 128 oz, poured into 25k gallons would have only a negligible bump up of pH.

cledee · Jun 18, 2022

So if your pool was 7.2 ph prior, adding 1 gallon may bump it up to 7.25 or 7.3, but nothing significant?

Endro32 · Jun 18, 2022

cledee said:
So if your pool was 7.2 ph prior, adding 1 gallon may bump it up to 7.25 or 7.3, but nothing significant?

Right, but by the time that gallon's worth of FC has been used up, the pH will have come back down to 7.2. So if you add one gallon each day to maintain your FC level, your pH may fluctuate +/- 0.1, which is completely fine.

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PH with Liquid chlorine

cledee

Endro32

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an1vrsy

cledee

Endro32

Active member