Stabilizer (Cyanuric Acid)
When chlorine is added to the pool, it takes the form of Hypochlorous Acid (HOCl). Unfortunately, Hypochlorous Acid is very unstable in the presence of sunlight and dissipates very quickly. The result is that chlorine will quickly disappear from an outdoor pool on a sunny day . . . unless you have a proper amount of stabilizer in the water.
Stabilizer is a chemical that is added to the pool water to help to keep the chlorine from being used up too quickly.
Stabilizer works by slowing down the chlorine reaction in the water. The conversion rate of the chlorine is reduced by a factor of 5 to 10 times (Merck). This can be both good and bad. At the proper levels (30-60 ppm) it will be effective at keeping the chlorine consumption to a reasonable level.
There are a couple of problems that can result from…
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Swimm Pool and Patio 