Pool Math question

[LisaDLu]

My numbers for today are:

PH - 7.8
TA - 80
FC - 4.5
CC - 0.5
CYA - 60
CH - 450
Salt - 3000
temp - 92
CSI - 0.4

I've been using the Taylor booklet and CSI Watergram that came with my K-2006 kit to figure my chemicals but today used the pool math. Am I correct in thinking that the CSI number Pool Math is giving me under the "Now" column is what it has calculated from my chemical numbers? It is giving me a 0.24 while my Watergram is giving me 0.4. Which is correct?

 

[Richard320]

Probably both are right. Watergram gives the The Langelier Saturation Index. CSI and LSI are two different things.

Langelier and Calcite Saturation Indices (LSI and CSI))