Verify the correct CH target...


Well-known member
Sep 30, 2016
Alamo, CA
Here's where I'm currently at:

[TABLE="width: 179"]
[TD]FC (ppm)[/TD]
[TD]CC (ppm)[/TD]
[TD]TA (ppm)[/TD]
[TD]CH (ppm)[/TD]
[TD]CYA (ppm)[/TD]
[TD]Salt (ppm)[/TD]
[TD]SWG (ppm)[/TD]

According to the water balance documentation, CH needs to be around 350-450. Just got back from my local pool store where they were saying it really shouldn't be much above 200. Yes, they know I have a plaster pool. Which is it and what's your best guess as to why the other source is saying otherwise?



Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

Look at your CSI...

Using your numbers above you are at -.76 or corrosive

Increasing your CH to 450 drops you to -.34 and increasing your pH to 7.8 gets you in the -.16 range...

You only have two choices.. believe the Pool Store or us... and remember, we are not trying to sell you anything... :D

Jim R.