I recently finished a SLAM and now I'm trying to lower TA. I measured pH at 7.8 using the phenol red comparator test, added muriatic acid, and after a couple hours measured pH at 7.2.
One day later, the pH is back at 7.8. I ran the spa for a couple hours during that time, but there was no other aeration. Is such a rapid pH rise expected?
One day later, the pH is back at 7.8. I ran the spa for a couple hours during that time, but there was no other aeration. Is such a rapid pH rise expected?
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