There are 3 possibilities that I can think of:
1) People goo
2) Possibly in the past, you added some sort of pool chemical that reacts badly with chlorine
3) Some sort of testing error occurred.
Re: High reading for CC after shock treatment
There are 3 possibilities that I can think of:
1) People goo
2) Possibly in the past, you added some sort of pool chemical that reacts badly with chlorine
3) Some sort of testing error occurred.
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