What's an acceptable level to have pH for a short amount of time? I'm lowering pH to lower my TA. I'm getting the pH down to between 7.0-7.2 and then raising with both my water feature and salt system. Is it ok that my pool sits at that pH range for a day or so while I let it naturally rise up when I run my pump at night..... or should I be running my pump all day to raise my pH faster?