Sorry for highjacking the thread, but I am having the same issue...my numbers below from this morning.
Test results 25 Aug
FC - 3.6
TA - 80
PH - 8.2 (tested first with test kit, maxed out @ 8.0, backed up with digital meter recently calibrated)
Salt - 3555
Test results 18 Aug
FC - 4.4
TA - 90
PH - 8
Salt - 3263 (added salt due to heavy rains and having to drain down the pool)
CYA - 70
I might be over thinking the issue, but the PH is really the only thing I am having to chase right now (adding acid about every 1.5 weeks), we do have a LOT of black walnut leaves that drop into the pool, and I don't know if that could be one of the issues, we typically get them out the same day...but if you look in the skimmer...there is a bit of "tea".
Also, is there a best practice on when to test? I don't remember seeing anything (or I just missed it), and lastly, dry acid vs MA...I did read that if you had a SWG you should use MA vs DA, is there any truth to this? Does one perform better than the other?
Thanks