So I am playing with the pool calculator. I currently have 2 windows open side by side on my computer:
Window 1: Pool School - Water Balance for SWGs
Window 2: http://www.troublefreepool.com/calc.html (with my numbers)
I took all recommended numbers from Water balance for SWGs and plugged in the dead midpoint of the range into the right hand column of Pool Math ("target" column).
In the left hand column (the "Now" column), I plugged in my current numbers, which are pretty good and also within range.
When I mouse over the CSI in the "Now" column apparently my pool is: Corrosion of plaster likely despite having decent numbers. (not perfect, but decent enough)
But if I mouse over the CSI in the "Target" column the pool is still: Potential to become corrosive to plaster
my CH is a tad low and I plan on bringing that up this weekend, which will help. Also I would love to do the borates again and get those to 50 (had it 2 years ago and loved it, but skipped it last year, so my concentration is down) But the higher the borate # I plug in, the more corrosive the CSI gets.
I am well aware that the pH is the largest factor in the CSI calculation. But even though mine is currently on the low side, corrosion is still "LIKELY" with all values being dead center of suggested ranges.