Cyanuric Acid

Modified on Tue, 23 May 2023 at 10:21 AM

Cyanuric Acid (CYA) is a chemical compound that is often used in pool water chemistry as a stabilizer for chlorine. It helps to protect chlorine from being degraded by sunlight, which can reduce the effectiveness of chlorine as a sanitizer.

The recommended range for CYA in a swimming pool is between 30 and 50 ppm. If the CYA level is too low, the chlorine can be quickly degraded by sunlight, which can result in inadequate water sanitation and increased risk of algae growth. If the CYA level is too high, it can lead to reduced chlorine effectiveness, cloudy water, and even staining of pool surfaces.

To adjust the CYA level, pool owners can add CYA directly to the pool water, usually in the form of granules or tablets. It is important to note that CYA does not dissipate from the water over time, so if the CYA level becomes too high, it may be necessary to partially drain and refill the pool to lower the CYA level.

Regular monitoring of CYA levels is important to maintain proper water sanitation and prevent issues with pool water quality.


Note: When your CYA levels exceed the recommended range, you will need additional sanitizer to keep your water properly sanitized.    Free Chlorine levels should be 7.5% of your CYA levels for effective sanitization.