Playing around in pool math... I am trying to stay slightly negative on CSI to combat very light scaling until I can do a partial drain this winter (high CH).
Current TA is 50. I can try to keep pH down near 7.4, but it will drift again. Or I can get the TA down to 40 and be fine at a pH of 7.6, which will fluctuate much less. Lowering TA by 10 is just as effective as lowering the pH.
I've seen talk of the pH crashing if the TA is too low, so what's the lowest stable TA you've kept your pool at?