confusing numbers

[JakeP5253]

Tested the water this morning and have some interesting results.
PH 8.0
FC- 3.0
CC- 0
CH- 250
TA- 70
CYA- 30
Salt- 3000
Temp- 75

when I put this in pool math it gives me a CSI of .04.....thats nice, but I want my cya higher and my ch closer to 400. When I put those values in to see how much calcium and cya I need it changes my CSI to -.32. How does getting my numbers in line with recommended levels make the CSI worse?

 

[mknauss]

Raising those two items will increase your CSI. Check the temperature being used in each calculation.

Share your Poolmath data. Makes it easier for us to help.

 

[JakeP5253]

im not sure what you mean about sharing my pool math data...Im using the website not the app. temp is set to 75

 

[mknauss]

Ah -- OK. Have to have the app for us to see the data.

Check all your data inputs. Be sure the Borates are 0, etc.

 

[magiteck]

What is your pH? That impacts CSI as well.

 

[JakeP5253]

Just downloaded app and entered numbers...added ph to original post

 

[mknauss]

Just downloaded app and entered numbers...added ph to original post

Be sure to share data in Settings.
Also need to purchase Premium subscription to save data, if you wish.

 

[JakeP5253]

done

 

[mknauss]

done

It may take a bit for the servers to catch up. Your Poolmath Logs are not showing up on your Membername panel yet.

 

[magiteck]

It may take a bit for the servers to catch up. Your Poolmath Logs are not showing up on your Membername panel yet.

I can see them now. @JakeP5253 you can also have the app calculate/log CSI for you.

Click the settings gear icon on the top right and then you can toggle this:

 

[JakeP5253]

OK...think I have it all correct now...for the record, water looks great I was just confused by the numbers

 

[mknauss]

Whenever you test, add your test data to Poolmath. Save it by touching the check mark in the upper right. That will keep a running log of your data.

 

[magiteck]

Your pH is currently on the high end. If you play with the numbers and say your pH was 7.6, what does that do to your CSI? And then if you increase your CH like you want, but with a lower pH, what does that do?

 

[JakeP5253]

Thats when I noticed my CSI going the wrong direction....I added acid, Calcium, and CYA....I'll test again in a day or so and update. I was just surprised by the results

 

[mknauss]

pH and TA are very strong factors in CSI. So if you lowered pH by alot, but only raised CH a little, it can effect. Also if you raise the CYA level and do not retest TA, the carbonate alkalinity of the TA is assumed to be lower and that lowers CSI.

 

[JakeP5253]

got ya....I just need to give it some time and run the full test again and see what happens. I'm micro-managing lol