Following a water change-out in January to address a nasty CYA issue, I have had a nice chemistry balance that I've been able to maintain using only bleach, muriatic acid and a weekly scrub-down. However, on the most recent test I noticed my TA is now down to 70 ppm. (It's been drifting down from 100 since the change-out.) Is it time to act on that, or can I left it drift lower? If so, at what point do I need to act? Here's my latest data:
Thanks in advance for the advice!