May 12, 2026
Permit/Opening
21 - cyanuric acid level not exceeding maximum
Regulation: 511-3-5-.17(4) - (4) stabilizer (if used) cyanuric acid,ppm ideal: 30-50 maximum: 90 comments: if stabilizer is: too high: - may reduce chlorine efficacy too low: - chlorine residual rapidly destroyed by sunlight note: stabilizer is not needed in indoor or br
511-3-5-.17(4) - (4) Stabilizer (if used) Cyanuric acid,ppm Ideal: 30-50 Maximum: 90 Comments: If stabilizer is: Too High: - May reduce chlorine efficacy Too Low: - Chlorine Residual rapidly destroyed by sunlight Note: Stabilizer is not needed in indoor or br (4) Stabilizer (if used) Cyanuric acid,ppm Ideal: 30-50 Maximum: 90 Comments: If stabilizer is: Too High: - May reduce chlorine efficacy Too Low: - Chlorine Residual rapidly destroyed by sunlight Note: Stabilizer is not needed in indoor or brominated pools and spas. Note: Observed CYA @ a concentration greater than 100. PIC to bring CYA down