How To Lower CYA (Cyanuric Acid)

by Madge
(Eugene, OR)

What is the best way to lower the cyanuric acid level in my swimming pool?


I think it's a little high but I wanted to know what you thought.




Thanks for your question Madge

There has been much debate on how high the cyanuric acid (CYA) should be.

Some people believe that a higher CYA, around 150ppm, is alright because it's really the TDS or Total Dissolved Solids in the pool that you should be concerned with.

You can get that checked at your local pool store.

Other people believe that the cyanuric acid should be 7.5% of your chlorine level and keep it between 30 - 50ppm.

Swimming Pool Chlorine

Adjust Your Swimming Pool Chlorine

You can use chlorine tablets to increase your cyanuric acid level or an actual stabilizer.

Swimming Pool Chlorine Tablets

It may take a long time to reach 100ppm by just using chlorine tablets.

I have found the best range for cyanuric acid is between 30 - 50ppm.

There is no chemical to reduce the amount of CYA in your pool.

It can only be reduced by either partially or completely draining the pool.

I would start first by testing your pool for cyanuric acid using a FAS-DPD Reagent K-2005 or 2006 test kit.

Swimming Pool Water Testing Kit

It's the one I've used for years and the most accurate.

Find out what the CYA level is and drain accordingly.

If your CYA is closer to 100ppm then a 1/2 - 2/3 pool drain might be in order. With chemicals it's normally better to start low and work your way up.

Hope this help and best of luck with your pool

Robert

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Chlorine Block?

by Marie
(NJ)

Is it necessary to drain the whole pool to help with a chlorine block in a liner inground pool?




Thanks for the question Marie

If you could define what you mean by "chlorine block" it would help. Many pool store employees use this term. I think they mean that the chlorine is somehow locked up and you need to get it unlocked.

What they normally mean is this: I have no idea what your problem is, but I need to say something so you'll think I know what I'm talking about.

Please give me more details to your situation. Where did you hear this and why do you think you have a "chlorine block". What is you understanding of it?

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Chlorine" category.

Swimming Pool Questions & Answers

Check back to this post for updates or answers.

Hope this helps and have a great Summer.

Robert

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Lower the Cyanuric Acid (CYA)

by Mike
(Austin, TX)

I have a question about cyanuric acid (CYA)? How do you lower it if it becomes too high?




Good question Mike

There has been much debate on how high the cyanuric acid (CYA) should be. Some people believe that a higher CYA, around 150ppm, is alright because it's really the TDS or Total Dissolved Solids in the pool that you should be concerned with.

You can get that checked at your local pool store. Other people believe that the cyanuric acid should be 7.5% of your chlorine level and keep it between 30 - 50ppm.

Swimming Pool Chlorine

Adjust Your Swimming Pool Chlorine

You can use chlorine tablets to increase your cyanuric acid level or an actual stabilizer.

Swimming Pool Chlorine Tablets

It may take a long time to reach 100ppm by just using chlorine tablets. I have found the best range for cyanuric acid is between 30 - 50ppm.

There is no chemical to reduce the amount of CYA in your pool. It can only be reduced by either partially or completely draining the pool. I would start first by testing your pool for cyanuric acid using a FAS-DPD Reagent K-2005 or 2006 test kit.

Swimming Pool Water Testing Kit

It's the one I've used for years and the most accurate. Find out what the CYA level is and drain accordingly. If your CYA is closer to 100ppm then a 1/2 - 2/3 pool drain might be in order. With chemicals it's normally better to start low and work your way up.

Hope this help and best of luck with your pool

Robert

Click here to post comments

Return to Pool Chlorine.

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