A pool stabilizer, also known as pool conditioner, chlorine stabilizer, or cyanuric acid (CYA), serves to protect the chlorine in your pool from being rapidly broken down by the sun's ultraviolet (UV) rays. By stabilizing the chlorine, it helps the sanitizer last longer, which keeps your pool water clean and safe for a longer period
. Specifically, stabilizer forms a chemical bond with the chlorine, shielding it from UV degradation. Without stabilizer, up to 90% of chlorine can be destroyed by sunlight within a few hours, leading to faster chlorine depletion and increased risk of algae growth and unsanitary conditions
. This is especially important for outdoor pools and saltwater pools, where maintaining proper chlorine levels is critical for sanitation
. The stabilizer does not evaporate like chlorine; it remains in the pool until water is drained or diluted. Typically, stabilizer is added once per season when opening the pool or when adding fresh water to compensate for dilution
. Ideal stabilizer levels are generally between 30-70 ppm for chlorine pools and 50-70 ppm for saltwater pools
. However, too much stabilizer can suppress chlorine effectiveness, causing a "chlorine lock" where chlorine becomes ineffective at sanitizing. This requires partial water replacement to correct
. In summary, pool stabilizer:
- Protects chlorine from UV rays, extending its lifespan
- Helps maintain consistent chlorine levels for effective sanitation
- Reduces chlorine consumption and chemical costs
- Prevents rapid chlorine loss, algae growth, and cloudy water
- Needs to be monitored to avoid excessive levels that reduce chlorine efficiency
