Because NJ temperatures will drop accordingly and water will freeze in the pool (only a few inches at most), while the remaining water will probably stay between 34-45 * (best guess, but could be wrong), what should the levels be adjusted to:
My CSI, if I close with FC of 8 (50% of shock level based on CYA of 40), plus the addition of polyquat-60 algaecide, and where the levels are as follows:
If the water temperature is 80 *, the CSI is -0.06. If the water temperature is 34 *, then the CSI is -0.60. If PH increases to 7.8, with water temperature at 34*, then the CSI moves up to -0.31.
Chances are that water will be warmer, probably at 40*. If this is the case, a PH of 7.8, then the CSI is -0.24. If the PH stays at 7.5, where I usually keep it at, then the CSI jumps back down to -0.54.
Does it make sense for me to increase PH to 7.8 (with aeration only) and then close the pool, Increasing the CSI and trying to get the index between the levels suggested in Pool Math? Thank you.
Please note that I am using Jesse's spreadsheet, but have confirmed the CSI in Pool Math.