I puzzled and need some guidance as to what is most important to prevent calcium scaling. Last year I closed my pool with the following readings:
Water Temperature 61
FC 21.5 As I slammed before closing
When I opened my pool I had scaling. However, my reading at opening were as follows:
Water Temperature 53
PH over 8.4 based on the PH test scale
So yes, my PH went above 8 PPM, but the CSI was 0. I was told when closing my pool on this forum that as long as CSI was between 0.6 and -0.6 the high CH would be ok. Any thoughs would be really appreciated.