What is your TA. I suspect it is very low to cause that kind of pH bounce. The soda ash will also raise your TA along with the pH so check both!
Re: pH of 3.5 - Never before.
What is your TA. I suspect it is very low to cause that kind of pH bounce. The soda ash will also raise your TA along with the pH so check both!
Retired pool store and commercial pool maintenance guy.
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