First time calculating CSI ...

[whatdidigetmyselfinto]

Got my 2006 for the first time this year and my current results for my pool
-> Viynl pool with SWCG, Gas heater

FC : 3.5
CYA : 30
TA : 90
CH : 180
pH : 7.5
Water temp : 80F

CSI calculation on
poolMath is - 0.43
Taylar chart : -0.18

I know my FC is a bit off right I know, I am trying to finish my old supply off Trichlor pucks - did not activate the SWCG yet. But when those pucks are finished, back to SWCG.

I have read about the what the TA/CH values should be for a viynl pool with a gas heater/ SWCG. CH 200 is recommended. TA: 60-80 is recommended. pH should not be too low (7.5 is ok i think) And pH tends to drift higher during the season and I need to bring down every year w/ Muriadic acid...

Should i try to adjust TA/CH at all - values are very close to recommended.

Why is the poolMath / Taylor CSI values different? Or am i reading the char somehow wrong??
Am I doing OK w/ my CSI?

Thanks

 

[mas985]

Are you talking about this:

Using The Circular Watergram® Balance Calculator

www.taylortechnologies.com

LSI and CSI are not the same thing and will result in different numbers so you can't directly compare the two.

CSI is what we generally use on TFP and -0.43 CSI is just fine. No need to adjust anything. Given that you stopped using pucks, PH is likely to rise anyway raising CSI with it. I will usually target around -0.4 but only make adjustments when CSI gets below -0.6 or above -0.2.

 

[whatdidigetmyselfinto]

Yes the Watergram.
The wording on that chart suggested it was also measuring CSI... I guess not.
Mystery solved.

 

[mas985]

This has a bit more information:

CSI and LSI - Further Reading

www.troublefreepool.com