High Stabilizer Issue?

We have the Answer.

Unfortunately, there is no chemical to lower Cyanuric Acid (Stabilizer).

Once your level of Cyanuric Acid exceeds 50 ppm for pools using chlorine tablets, or 100 ppm for salt systems, you will need to drain some water from your pool and refill with fresh water.

During years of adding various chemicals, you build up a high reading of Cyanuric Acid. If you are using dichlor or trichlor as your primary chlorine sanitizer, you are already introducing Cyanuric Acid along with the chlorine.

The suns (UV) rays will make the chlorine in an outdoor pool dissipate quickly. In fact, an ideal level of chlorine in an “un-stabilized” pool can be lost in less than two hours on a bright sunny day, due to the UV rays of the sun. Cyanuric acid acts as a “stabilizer” that helps chlorine hold up better when exposed to the UV rays. Kind of like a sunscreen for your pool.

You should maintain an ideal level of Cyanuric Acid of 30-50 ppm for pools using tablets and 100 ppm for pools with a salt generator, to prevent rapid chlorine loss. If the Cyuranic Acid level is to low, you may have to add more to the water. However, be advised that Cyuranic Acid will make the pH of the water lower (more acidic) so you may have to adjust the pH upward as well.

On the other hand, too much Cyanuric Acid will reduce the beneficial effect of your chlorine, leading to stains and cloudy water.

Be sure not to backwash your pool for at least 24-48 hours after adding stabilizer.
If your filter is dirty and your Cyanuric Acid level is low, backwash first, then add the Cyanuric Acid.