Hot Tub Stabilizer 101 Hot tub stabilizer is used to bond with the chlorine, preventing this reaction. It stops the chlorine from quickly breaking down, eliminating the need to constantly be adding new chlorine and saving you money by using fewer chemicals.Click to see full answer. Beside this, why is stabilizer high in hot tub?Stabilizer. Under the sun, chlorine in your pool or hot tub becomes very unstable. Stabilizer is a chemical that slows down the rate at which chlorine reacts in the water. It will be effective if the amount in your water is kept between 40 and 80 PPM (Parts per Million).Also, how do you dissolve a pool stabilizer? Because stabilizer granules are slow to dissolve, certain manufacturers recommend dissolving cyanuric acid in warm water before adding it to the pool. Others recommend broadcasting the granules over the pool by adding the product near a jet or return line. Additionally, what is cyanuric acid in a hot tub? – Cyanuric acid forms a weak bond with free chlorine in the pool water, protecting it from the sun’s ultraviolet rays to reduce chlorine loss. Properly managed, cyanuric acid has. been shown to reduce the amount of chlorine needed to maintain the minimum chlorine residual in an outdoor pool.Does CYA reduce over time?Yes, entirely possible. As you point out, there is a testing variance to consider and CYA will naturally degrade a few ppm per month, maybe a little more.