Cyanuric Acid is generally added to your water through your sanitizer. Cyanuric Acid in your water is not a bad thing and is quite helpful in reducing chlorine burn off. However, when it does get too high it can have an impact Free Chlorine effectiveness and that could cause false pH readings. This is why it's important to have your CYA at a stable level of around 50 ppm. As part of the Crystal Water Monitor solution, we ask for your Cyanuric Levels during our Monthly Water Report request
Below is a table that shows the likely source of a High Cyanuric Acid level:
| Source | Effect on CYA | Solution |
| Liquid Chlorine | None. It is "unstabilized." | It could result is having too low of a level of CYA, so adding CYA based upon the volume of the water would help. |
| Chlorine Tablets (Trichlor) | High. They are roughly 50% CYA by weight. | This is how your CYA increase will likely sneak up on you, so switching to Cal-Hypo Tabs will help in this situation |
| Shock (Dichlor) | High. Adds a significant dose of CYA with every bag. | Another way that CYA sneakily increases in your water. Towards the end of pool season, switching to liquid chlorine will help prevent this from increasing and taking drastic measures to reduce your CYA Levels |
| Cyanuric Acid | High. Most chlorine pools or hot tubs won't need Cyanuric Acid added directly, but if you do add this chemical, you need to make sure it is the correct amount in relation to the volume of your pool | If you happen to add too much Cyanuric Acid at the opening of your pool or as a stabilizer for your Saltwater Pool, you will need to reduce by performing a drain and refill |
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