Lowering TA with Dry Acid Or Muriatic Acid

[CarlD]

I have borderline Alk reading of 70 and 7.9 PH... How much baking soda do I had to raise Alk and how much Muriatic acid do I had to lower PH

Say you have a 15,000 gallon pool. Start with 1 lb of baking soda and 1 cup of muriatic acid. I'd add them at least an hour apart (acid first), then wait a few hours (say 6?) and measure pH and T/A again. Go slow, use a little bit at a time so you don't overshoot targets. If you lower pH from 7.9 to 7.3, T/A should come down still further.