TA 120 but everything else is good

No concern, simply watch your pH and keep it below 7.9 with muratic acid applied in front of a return jet. Test your fill water for TA. This is probably why your TA rises.
 
Only way TA could go up that much is by adding baking soda or sodium carbonate. Or a lot of fill water with high TA.

It is not a problem. Just maintain the pH in the 7's.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.