"Perfect" CSI of "0"?

[PoolGate]

Is the ideal CSI actually 0? I ask because with the numbers I got from today's testing, once the pool temp is 88, I will be at almost exactly 0. I was going to increase my CH by 100 to 350 but now I am questioning if that is needed.

FC 5.5
CC 0
pH 7.8
TA 90
CH 250
CYA 70
Salt 3400
Temp 88
CSI -.02

 

[JamesW]

Zero is pretty good for a concrete pool. A little bit negative helps reduce scaling in the salt cell.

 

[pooldv]

I prefer -0.3 as my "ideal" number. As James says, to avoid scale in my SWG. Anything between -0.6 and 0 is fine. No need to fine tune it.