CSI for winterizing

[sktn77a]

I see that CSI is a function of temperature - the lower the temperature, the lower the CSI. The difference between 85 degrees and 35 (our typical annual water temperature swings) is quite significant - ~0.5. Should I increase the CSI before closing the pool to the upper limit of ideal (ie +0.3)?

 

[Texas Splash]

No need to go to extremes. While the water temp drops, the pH is expected to increase. Just balance the pH in the between 7.4 and 7.6 and make sure TA and CH are not too far out of line.

Closing an In Ground Pool

Winterizing a pool is essential for keeping your in-ground pool protected during cold-weather months. This Pool Repair guide will show you how to do it.

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