CSI in my vinyl IG pool

[tamccain]

So, I ran the full gamut of tests today and was pleased with my numbers, however I became concerned about a number that I noticed in Pool Math. When I input all my numbers, the CSI shows -0.94. That seems really low, but I am not sure if it is anything to be concerned with.

Here are my numbers
PH 7.2
FC 5.4
CC .2
CYA 80
CH 100
Salt 2800
TA 100

I am using a SWG, so that is why my CYA is high.

 

[Texas Splash]

Nope, nothing to be concerned about at all with that vinyl pool. Low CH is only a concern with pools that have calcium in their shell (i.e. plaster). You're looking good. Have a nice weekend.

 

[MarianParoo]

Just FYI. You can use a 10ml water sample for FC/CC and then just multiply your drop count by 0.5, or divide by 2.

 

[tamccain]

Just FYI. You can use a 10ml water sample for FC/CC and then just multiply your drop count by 0.5, or divide by 2.

I normally do the 10ml sample, but on occasion I like to do the 25ml sample just to get a little more precise number.