Cyanuric Acid

What It Means: Cyanuric Acid (CYA), also known as stabilizer or conditioner, protects chlorine from being broken down too quickly by the sun’s ultraviolet rays. It’s essential in outdoor pools to maintain effective chlorine levels and reduce the frequency of shocking.

Ideal Range: 30–50 ppm (up to 70 ppm for saltwater pools)

If CYA Is Too Low: Without enough stabilizer, your chlorine will dissipate rapidly, especially in sunny conditions. This can lead to increased chlorine consumption and inconsistent sanitizer levels. Raise CYA using EZ-Pour Stabilizer, available from Chlor-Dash. This easy-dosing solution helps lock in chlorine effectiveness and reduce waste.

If CYA Is Too High: Too much CYA can inhibit chlorine’s sanitizing power, leaving your pool vulnerable to algae and bacteria—even when chlorine levels appear adequate. The only way to reduce CYA is to partially drain and refill your pool with fresh water. Retest after dilution to ensure proper balance.

Best Practices:

• Use a stabilizer only in outdoor pools; indoor pools generally don’t require it.

• Add stabilizer slowly and allow 24–48 hours for full dissolution before retesting.

• Test monthly or more frequently if using stabilized chlorine tablets.

Chlor-Dash Recommends:

• EZ-Pour Stabilizer to raise and maintain proper Cyanuric Acid levels

• 3" Chlorine Tablets (stabilized) to help maintain residual CYA in sunny climates