Poolside by CGT Pool Liner Care and Maintenance Guide
What Is Pool Stabilizer? Cyanuric Acid (CYA) Guide
Cyanuric acid (CYA) – commonly called stabilizer – is ‘like sunscreen for a pool.’ It prevents sunlight from destroying chlorine, keeps the levels stable, and maximizes chlorine’s sanitizing ability. A concentration below 20 ppm will fail to keep the chlorine ‘stable’, and the chlorine levels will quickly decrease over time. Concentrations greater than 40 ppm may reduce how efficiently chlorine kills microorganisms in the water. Maintaining proper cyanuric acid levels in pools helps chlorine last longer in sunlight.
Target Stabilizer
20 – 40 ppm
FAQ
What does pool stabilizer (cyanuric acid) do?
Pool stabilizer, also called cyanuric acid (CYA), protects chlorine from being destroyed by sunlight.
The recommended pool stabilizer level is 20–40 ppm.
- Below 20 ppm, chlorine breaks down quickly in sunlight.
- Above 40 ppm, chlorine becomes less effective at killing bacteria and algae.
Maintaining proper stabilizer levels helps keep chlorine working efficiently in outdoor pools.