I have a pentair cya test kit (R151226 79) and getting quite a significant difference between different reagent bottles. I was using one that was almost empty and got a result of 120ppm. Tested in exact same lighting conditions. Used a bottle that’s never been opened and got 60ppm. There are no expiration dates for these so I’m not really sure what the deal is. Got both reagents no more than a few months ago. Could one just be a dud? Not sure what is actually correct. I can’t be having variations like that since this is a commercial pool. Any more accurate testing for CYA out there? Thanks.
CYA testing
- Thread starter Blake106
- Start date
kul
Bronze Supporter
- Oct 1, 2021
- 1,279
- Pool Size
- 15000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
The Tf-100 and the Taylor K2006 are recommended here and seem to be accurate. I have the TF100.
tftestkits.net
TFTestkits.net
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- Jul 21, 2013
- 53,130
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
How did you read 120 ppm? The Pentair test only has a 100 ppm line as its maximum and then a 60 ppm line before it?
50% pool water and 50% distilled water for the “A” line. There’s a faint white extrusion between line A and the bottom of the test tube for a 50/50 dilution test, well at least it looks like it’s there for that exact purpose. Doesn’t say in instructions.
Thank you for the recommendations.The Tf-100 and the Taylor K2006 are recommended here and seem to be accurate. I have the TF100.
TFTestkits.net
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- Jul 21, 2013
- 53,130
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
When you dilute the sample by 50% you double the error. The CYA test starts with a wide variability. I would take the 120 reading as inaccurate but telling you it is not far above 100.
So between the two reagents your CYA is between 60-100.
What is the CYA range you are allowed in your commercial pool?
Where I am in Hawaii there doesn’t seem to be any enforcements of CYA and cannot find anything on the internet about it, as long as the FC is at least 0.6ppm and PH is between 7.2 and 7.8 it’s good to go for the inspection. I follow the the average mainland enforcements for a public pool because it makes me feel more comfortable, so for me 20-100ppm CYA and follow the fc to cya ratio. Would prefer to keep cya at 30 but it’s challenging because we have trichlor tab chlorinators and manual dosing of liquid chlorine or cal hypo just barely makes it through the day.
Last edited:
- Jul 21, 2013
- 53,130
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
With your CYA you need to keep the FC in the 8-12 ppm range.
I would plan for a 50% drain of the pool soemtime soon to bring the CYA down before it gets too high.
www.troublefreepool.com
I would plan for a 50% drain of the pool soemtime soon to bring the CYA down before it gets too high.
What Are My Ideal Pool Levels?
Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.
www.troublefreepool.com
Taylor’s cya test tube #4088 for kit L-0206 and pentair’s test tube appear to be identical, can I use Taylor’s r-0013 reagent in a larger quantity bottle for the pentair kit I currently have?
- Jun 1, 2018
- 13,881
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
The regeant is the same i believe-
I have used blue devil cya regeant (which is rebranded pentair regeant) in place if r0013 with similar results due to availability issues.
The amount of regeant & pool water you use for those slider tubes is higher than with the Taylor 9193 tube or the tf100 cya tube so you will go through reagent faster. The latter use a separate mixing bottle then you pour it into the view tube. They can both be had for less than $10 if u wish to change your method .
I have used blue devil cya regeant (which is rebranded pentair regeant) in place if r0013 with similar results due to availability issues.
The amount of regeant & pool water you use for those slider tubes is higher than with the Taylor 9193 tube or the tf100 cya tube so you will go through reagent faster. The latter use a separate mixing bottle then you pour it into the view tube. They can both be had for less than $10 if u wish to change your method .