New to TFPC

[proavia]

I will test the CH again later today. I could very well have not followed the directions correctly. The CYA change is the difference between using test strips (that shows to be not accurate) against the new TF100 Pro Salt kit that I just received on Saturday afternoon and test for the first time Sunday afternoon. I am assuming that is more accurate.

That could explain it.
Never add anything to the pool based on test strips.

With CYA 90, SLAM level is FC 35.
It may be better to drain to get CYA down to 60. CYA 60 with a SWG should serve you well in summer in Grand Rapids.