I have high CH – incoming water around 200ppm and lots of evaporation. Last year it got to around 650 , doing my best to manage it with good pH control. Partial drain/refill last month got it under 400. Drain/refill is several hundred dollars between water, borates, acid, salt….
See below for chemistry and please comment if any improvements I can make! (numbers from a ‘good’ test kit!)
FC = 5
pH = 7.7
TA = 80
CH = 380 (current)
CYA = 75
Salt = 3500
Borates = 50
Temp = 70 and rising
Looking good? This gives me a CSI of -0.26. As temp goes up CSI will move closer to zero. As CH goes up (and it will!) it will also drive CSI up.
As long as I keep pH and TA where they belong, and CSI slightly negative, it should not be an issue as CH increases, correct?