The serious health issues surrounding cyanuric acid buildup in pools using trichlor can’t be ignored. Here’s some basic information everyone in the commercial pool industry should know*:
- Cyanuric acid (CYA) is also known as stabilizer. (Note: Chlorine products that contain cyanuric acid are referred to as stabilized chlorine products.)
- It’s used in pools to protect against the sun’s UV rays, which destroys chlorine.
- Too much CYA, however, causes a reduction in chlorine’s effectiveness and therefore increases the amount of time it takes to kill bacteria.
- CYA does not get consumed, but rather accumulates in pool water.
- In trichlor tablets, it’s actually bound with chlorine so as tablets dissolve, CYA accumulates and reduces the potency of the chlorine.
- Some states advise against using CYA at all or restricting its ppm limits for use only in specific outdoor water venues.
* Reference: Pool & Spa Operator Handbook, NSPF 2014 (page 53).
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