Don't understand how to read csi in pool math

[boots]

Ok, I don't understand the poolmath part about csi. Sorry, but I am just not great at math. My csi is stated at -0.31. is this bad?

FC 8
CC .5
pH 7.5
TA 60
CYA 60
CH 325

Calcite Saturation Index - requires pH, TA, CH, CYA, Temp, uses Borate, Salt
Less than -0.6 is suggestive of problems for plaster, tile, stone, and pebble pools.
Greater than 0.6 is suggestive of problems for all pools.

So my csi is less than or more than -0.6? Negative numbers and such don't remember the rules. It's been a long while since college alegebra.

 

[mknauss]

-0.31 is between -0.6 and 0.6. So that is good.

 

[ctrav]

Numbers seem fine. I use to chase the CSI to stay at a specific range. Not anymore as I just want it to be within the guidelines! How does pool look?

 

[boots]

Pool water is great after I slammed it last week, FC is finally at recommended levels. Next I work on the stains from the iron in my pool. Ordered the ascorbic acid and I just need to find a good but cheap metal sequestrant.

 

[ctrav]

I have never had to deal with iron issues but someone will have an answer or suggestion soon...

Good to see ya using TFPC!!

 

[an1vrsy]

Keep in mind CSI also requires water temp. I didn't see temp in your post. However, with your location in FL your water is at least 85 degrees.