For how long I should wait to enter the pool after I put acid?
Md Ariful Islam
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Dr. Md Rushad Rahman
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Depending on how much acid you added and if your filter is moving the water rapidly about a hour, check with your test kit (phenol red), it will let you know the acid level. I add a bit less than calculated and then adjust further in small doses, that saves money. Note: you should retest next day as some cement/concrete pools react with acid causing a small pH bounce.
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