What Is CSI?

[ChristineO]

Your CH is fine at 310. Over the summer as you keep topping it up it will keep rising. Unless your autofill is plumbed to soft water and even then I’d leave the CH alone. Turn on CSI tracking in Poolmath, that will give you a good water chemistry overall balance.

What is csi tracking?

Moved from here.

 

[ChristineO]

Hello. What pool thermometer do you recommend? The floating duck seems broken in a season. Also what is CSI and should I be tracking it?

 

[ajw22]

If you have a plaster pool then CSI is important to be aware of in your water chemistry....

Calcium Saturation Index (CSI)

How is CSI calculated? Very simple – use our PoolMath tool. To ensure long plaster life and save money, click here to learn more.

www.troublefreepool.com

CSI and LSI - Further Reading

www.troublefreepool.com

 

[atxjmy512]

Piggy backing off of this thread because i had some similar questions. In general, you want to keep a + CSI, correct? I generally shoot for this, but winter is coming (eventually) and when I'm playing around with my levels, i see my CSI quickly goes negative with 40 - 60 degree water temps at my current pH, TA, and CH levels... How much of a negative CSI is ok?

 

[mknauss]

CSI between -0.3 and 0.3 is fine. Short duration below or above that range will not do any damage to the pool surface.
SWCG pools should attempt to keep CSI between -0.3 and 0. This inhibits the formation of scale in the SWCG cell.