St. Cyr Chlorine Stabilizer 4lbs
St. Cyr Chlorine Stabilizer 4lbs is a granular pool chemical formulated with 100% cyanuric acid. It acts as an essential pool water additive that protects chlorine from being rapidly degraded by the sun’s UV rays, helping chlorine last longer and reducing overall chemical costs.
Key Features and Benefits
- Shields chlorine from sunlight, significantly reducing chlorine loss
- Increases chlorine efficiency and extends sanitizer life
- Minimizes the frequency of chlorine additions, saving on chemical expenses
- Granular formula for simple, controlled dosing
- Safe for use in all types of pools, including those with salt systems
Directions for Use
- Startup dosage: Use about 2.5 lbs per 10,000 gallons to raise cyanuric acid (CYA) by 30 ppm. Dosage may vary slightly; always test water and adjust as needed.
- Application: With the pool pump running, slowly add the stabilizer directly to the skimmer or broadcast into the pool (avoid contact with pool surfaces). Brush any undissolved granules.
- Wait time: Allow water to circulate for several hours, ideally 24–48 hours before retesting CYA levels. Do not backwash or clean the filter for at least 72 hours after adding stabilizer.
- Ideal CYA range: 30–50 ppm for most outdoor pools. Test your pool’s stabilizer level at the start of the pool season, after water changes, or after substantial dilution from rain or splash-out.
Why Use Chlorine Stabilizer?
Without a stabilizer like cyanuric acid, sunlight can destroy up to 90% of the chlorine in pool water within hours. This leads to more frequent dosing, higher chemical costs, and less reliable sanitation. St. Cyr Chlorine Stabilizer protects your chlorine investment and helps keep your pool water sparkling, clear, and safe for swimmers.
