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  1. The Free Chlorine and Cyanuric Acid Relationship

    Sep 1, 2025 · Stabilizer (Cyanuric Acid or CYA) CYA protects your free chlorine (FC) from the sun, reducing the amount of chlorine you need to add daily. Too much CYA (more than about …

  2. 3" chlorine tabs without CYA - Trouble Free Pool

    May 4, 2009 · Why doesn't anyone manufacture 3" chlorine tabs without CYA in them? Is it not possible? Or if someone does, where can I buy it?

  3. CYA – Cyanuric Acid Test - Trouble Free Pool

    Feb 26, 2025 · Cyanuric acid (CYA) is the chemical name for the product commonly called “pool water stabilizer” or “pool water conditioner ”. CYA protects free chlorine (FC) from the sun and …

  4. CYA Testing - Further Reading - Trouble Free Pool

    Jan 4, 2025 · CYA Testing Follow the instructions for CYA Testing in Pool School. Read all of the notes in the Pool School article. Many people find the CYA test the most difficult to interpret …

  5. Cyanuric Acid and Alkalinity. - Trouble Free Pool

    Dec 13, 2009 · Cyanuric Acid and Alkalinity. I'm not sure if this has been posted elsewhere and I've read quite a few posts but not seen it mentioned. I read a paper some time ago regarding …

  6. Chlorine/CYA Chart - Trouble Free Pool

    Aug 6, 2007 · EDIT: You will find a simplified and standardized version of this chart at Pool School, Chlorine / CYA Chart. Chlorine/CYA Chart by Chemgeek FC = Free...

  7. PoolMath - Trouble Free Pool

    Sep 16, 2017 · PoolMath Discover the pool calculator behind the perfect pool, PoolMath. Dealing with pools has allowed TFP to become the original authors of the best calculator on the net. To …

  8. How did the CYA levels get so high in my pool

    Jun 28, 2012 · The main problem with the higher CYA is that it reduces the active chlorine level allowing algae to grow faster than chlorine can kill it. You can compensate for this by raising …

  9. Adding CYA - Correct Method? - Trouble Free Pool

    Jun 7, 2017 · Pouring granular CYA into the pool directly, or into the skimmer as recommended on stabilizer bottles, is not recommended as it takes a long time to dissolve and the granules …

  10. Free Chlorine - Further Reading - Trouble Free Pool

    Jul 27, 2025 · What is Free Chlorine in a Pool? Free chlorine, as measured by a TFP recommended test kit, is the sum of two forms of chlorine in your pool water - active chlorine …