CSI v. pH - which is more important

[joelans]

With the pool water down to 60 right now, my CSI less than -0.30 (plaster pool), but pH is 7.8. To get the CSI above -0.3, I would need to increase the pH to about 8.1, which is outside of the recommended range. So, what's more important - keeping pH below 8.0, or getting the CSI to above -0.3?

Thanks.

 

[casiokid]

Your CSI is fine at -0.3. Just keep maintaining the pH at 7.8.

 

[ajw22]

Don’t worry about low CSI in the winter due to cold water.

Your plaster will survive a few months of low CSI.

Your pH is more important to keep in the high 7s.