Pool Stabilizer (CYA) Calculator
Calculate the exact amount of cyanuric acid (stabilizer) to add to protect your chlorine from sunlight degradation.
Cyanuric Acid (Stabilizer) Calculator
Protect your chlorine from UV degradation
Ideal Range: 30 - 50 ppm (standard), 70-80 ppm (salt pools)
Cyanuric acid (CYA) protects chlorine from sunlight. Without it, chlorine burns off quickly. Too much reduces chlorine effectiveness.
Pool Volume
20,000 gallons
Amount to Add
52 oz
Cyanuric Acid (Stabilizer)
Tips
• 13 oz per 10,000 gallons raises CYA by 10 ppm. Slow to dissolve.
• Best dissolved in sock in skimmer basket
• Can take 3-7 days to fully dissolve and register on tests
About Cyanuric Acid (Stabilizer)
Cyanuric acid (CYA), also called stabilizer or conditioner, protects chlorine from UV degradation. Without it, sunlight destroys up to 90% of free chlorine within 2 hours. The ideal range is 30-50 ppm for regular pools, 70-80 ppm for salt pools.
The CYA-Chlorine Relationship
CYA "locks up" some chlorine, reducing its effectiveness. As CYA increases, you need more free chlorine to sanitize effectively. Rule of thumb: Maintain chlorine at 7.5% of your CYA level minimum.
Lowering CYA
Unlike other chemicals, CYA cannot be chemically reduced. The only ways to lower it are: partial drain and refill, or using bio-active CYA reducers (slow process). This is why it's important not to over-stabilize.