Protects chlorine from the degrading effects of sunlight (UV). Reduces chlorine consumption and saves money. Essential for swimming pools utilizing salt systems, liquid chlorine (bleach), and calcium hypochlorite tablets or granular for chlorination. The Cyanuric acid level should be maintained between 30 ppm and 85 ppm (refer to local regulations regarding acceptable levels in commercial pools). 1.5 Lbs. of Chlorine Stabilizer per 10,000 gallons of water will raise Cyanuric acid level 10 ppm.