High PH

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P

Paul Evert

Gold Supporter
Sep 21, 2023
69
Hardeeville SC
Pool Size
6000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Jandy Aquapure 1400
I can’t seem to keep The PH in the recommended/target range from week to week. I’m using a TF-Pro test kit. The PH side only goes to 8.2 so I estimate anything above that, usually between 8.4 and 9.2. My concern is that every week the water tests above 8.2 and I usually add 16 oz of 31.45% - 20 degree Baume. It has been that way for over the last 12 weeks. Is my situation unusual?

Current Readings
CYA: 70
CSI: 1.00
FC: 32.0
CC: 0.0
PH: 9.0
TA: 70
CH: 425
Salt: 2600
Water Temp: 59
 
I wanted to ask if your FC number was a typo, but your log shows your FC consistently that high?

The pH test is not accurate with FC that high and will give a false off-the-charts high reading.
 
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I haded noticed the high FC readings. Today it was 36 with a PH (estimated) of 8.6 after adding 16 oz of MA yesterday. It doesn’t look like there is anything I can do to lower the FC. Should I just suspend the testing of both until we have more sunny weather? I have attached a photo of the testing block from today.
 

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12.5 oz of 3% H2O2 will lower the FC by 1 ppm.

To lower by 26 ppm, add 10 quarts of 3% hydrogen peroxide or 81 oz 12% H2O2.

12% concentration is 4X more concentrated than standard hydrogen peroxide.

No additives included of any kind, just food grade H2O2 and water.

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www.homedepot.com

Harris 128 oz. 12% Hydrogen Peroxide All Purpose Cleaner HP12-128 - The Home Depot

Monitor soap levels in your bathroom with the use of this Harris Peroxide All Purpose Cleaner
www.homedepot.com

 
JamesW said:
12.5 oz of 3% H2O2 will lower the FC by 1 ppm.

To lower by 26 ppm, add 10 quarts of 3% hydrogen peroxide or 81 oz 12% H2O2.

12% concentration is 4X more concentrated than standard hydrogen peroxide.

No additives included of any kind, just food grade H2O2 and water.



www.homedepot.com

Harris 128 oz. 12% Hydrogen Peroxide All Purpose Cleaner HP12-128 - The Home Depot

Monitor soap levels in your bathroom with the use of this Harris Peroxide All Purpose Cleaner
www.homedepot.com

Click to expand...
Thanks for the solution; the issue appears to be solved. Some of the current targets are still off, but I have made adjustments on Pool Math recommendations.
 
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Warm your sample water up to room temp before testing, as low temps can skew test results.
Your CYA amounts have been all over the place - are you adding lots of water to the pool? Or it just may be the cooler temps and testing error making the readings bounce around.
Surprising that your SWCG was producing so much, given the cooler temp, and low salt concentration.
 

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sande005 said:
Warm your sample water up to room temp before testing, as low temps can skew test results.
Your CYA amounts have been all over the place - are you adding lots of water to the pool? Or it just may be the cooler temps and testing error making the readings bounce around.
Surprising that your SWCG was producing so much, given the cooler temp, and low salt concentration.
Click to expand...
The temperatures have been all over the place, and the test numbers for CYA could also be bouncing around because of how I'm reading them. I struggle to determine when the black dot completely disappears. The SWG of 15% was a mistake on my part. I reset it to 3% yesterday. I plugged in the wrong number and didn't catch it.
 
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