For the last 3 years since getting my first pool, I have to add acid to get the TA level down a bit due to partial spring refill.
Our city water has a TA of 375 or so.
Last week I added 48 oz. of acid and lowered the TA from 130 to 110 with some aeration for a couple days using a fountain pump.
My reading yesterday
TA 110 or 120, seems to fluctuate
FC 3.6--before adding 12% chlorine to get to 5PPM
Comb. chlorine 0
PH usually drifts back and forth from 7.2 to 7.8 throughout the summer
Should I not worry about 90 being a magic number to attain at pool opening.Pool never had algae and I run pump 8 hr. daily.