I am ready to close for the season and would like to be sure you guys agree with what I write below. My main concern, because it has been a problem in a prior year (and still is I guess but just because I haven't re-plastered the pool, it is just a little unsightly and during the season I can keep everything in line) is to try to avoid or minimize further calcium scaling.
During the season a few months ago, I discovered that a TA of 50, pH of 7.6 was better to keep things balanced with a CH of 350.
So the TA has dropped from 50 to 40, that's to be expected and I was going to bring that up to 50, but that results in a CSI of unbalanced, but if I get TA to 60 that results in a balanced CSI, even if the pH gets to 8.3 (my problem in a past winter was the pH got too high for too long over the winter, I learned my lesson and do test and treat things during the winter now).
I have been successful targeting a CYA of 45 and so I will raise the CYA from 30 to 45
So in review, I want to raise the TA to 60 & the CYA to 45, then shock before closing and allowing the FC level come down per the TFP recommended closing procedure, along with algaecide & the rest of the things.
Or do you want me to fiddle/raise w the TA some more, which I have not done in the pool calculator? Pretty easy to add baking soda over the winter to keep TA it in the 40-50 range.
This CSI can get a little tricky so I was hoping you guys could improve my game plan or okay it.