Concrete and SWGs both tend to raise pH so adding acid is normal.
To lower CH, you need to drain and refill with low CH water. I don't know how else to lower it.
Re: First 234s test results and warning about pool stores' results
Concrete and SWGs both tend to raise pH so adding acid is normal.
To lower CH, you need to drain and refill with low CH water. I don't know how else to lower it.
Carl
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