CSI Calculates Out of Range for Nominal Levels

[NicDMX]

I don't understand the CSI calculation. Everything I have read suggests that if you maintain your other levels, CSI will be fine. But when I type in the following parameters on PoolMath, it suggests the CSI will be -0.76:

24000 Galllons, SWG
FC - 4
pH - 7.2
TA - 80 ppm
CH - 350 ppm
CYA - 75 ppm
Salt - 3300 ppm
Borate - 0
Temp - 60

What am I missing?

 

[Mr Bruce]

Allow the pH to rise a little bit to the 7.5-7.8 range and the water will warm up as we get into summer. Both of those will let you drift back above -0.6

 

[HmnRcn]

I have been having the same problem. But if you let your Ph drift up to 7.7 you will be less than -0.3. My water temp has come up recently but I have just been maintaining Ph in the high 7’s in an attempt to keep the CSI in range.

 

[Demegrad9]

You not far off the -0.6 recommended range. The lower CSI is coming from you low Temp, high Salt, and you're on the lowest pH acceptable. Can't do anything about the salt, you need it. As temperature increases into summer, you'll be in range and just let pH come up and stay at or above 7.4 and you'll be solidly in range for CSI.