You shouldn't mess around with pH at the end of your measuring ability. It may be more than "a little less than the 6.8...". Aerating your water will raise your pH without raising the TA. If you add borax, the TA will go back up, not because of the borax, but because the pH and TA are pretty well tied together unless you aerate the pool while the pH is on the low end. Run a fountain or point your returns to the surface and leave the pump running.Originally Posted by fullhouse
You may still want to add some borax and get the pH into the reasonable range to avoid pool damage.
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