Ask The Pool Guy Q & A: Managing Elevated Cyanuric Acid Levels

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Understanding Cyanuric Acid Levels in Your Pool

In this informative session, Al addresses a common concern among pool owners: what to do when the cyanuric acid (CYA) level in your pool becomes excessively high. Cyanuric acid is essential for protecting chlorine from UV degradation, but when its concentration exceeds optimal ranges, it can hinder proper sanitation and water clarity.

Causes of Elevated Cyanuric Acid

High cyanuric acid levels often result from frequent addition of stabilized chlorine products, such as chlorine tablets or sticks containing CYA, without adequate water replacement. Over time, these compounds accumulate, leading to levels that can compromise your pool’s chemical balance.

Impacts of Too Much Cyanuric Acid

When cyanuric acid concentrations become too high—typically above 100 ppm—it can significantly reduce the effectiveness of your free chlorine, making it harder to disinfect the water properly. This condition can lead to cloudy water, algae growth, and overall poor water quality.

Recommended Solutions

  • Water Dilution: The most effective method to lower cyanuric acid levels is to partially drain your pool and replace the water with fresh, untreated water. This dilution reduces the concentration of CYA and restores proper chemical balance.
  • Regular Testing: Frequently monitor your cyanuric acid levels using reliable test kits or digital testers to keep track of fluctuations and prevent future build-up.
  • Preventative Measures: Limit the use of stabilized chlorine products and opt for liquid chlorine or unstabilized forms whenever possible to avoid unnecessary CYA accumulation.

Additional Tips

Always follow manufacturer guidelines and consult with a professional if unsure about chemical adjustments. Maintaining balanced water chemistry ensures a safe, clear, and inviting swimming environment.


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