Perfect Range 30 - 50 PPM (outdoor chlorine pools only)

Temperature + Total Alkalinity + PH + Calcium Hardness + Stabilizer Adjustment + TDS = Saturation Index

Stabilizer or Conditioner is used to decrease the suns effect on chlorine.  If your pool is indoors or if you don't use chlorine as a sanitizer, then you don't need it.  The suns ultra-violet rays break down and neutralize free chlorine so that it has no sanitizing qualities.  Stabilized chlorine compounds such as DiChlor and TriChlor contain stabilizer and release a small amount each time you add chlorine to the water.  Other chlorine compounds such as chlorine gas, sodium hypochlorite, calcium hypochlorite and lithium hypochlorite contain no stabilizer and are referred to as unstabilized chlorine compounds.

In a solution 25 PPM Stabilizer, Free Chlorine will last up to 5 times longer than in solutions without Stabilizer.  Solutions above 50 PPM have no additional benefit.  Stabilizer normally decreases in a pool by splashing, carry out and filter backwashing.  The use of Stabilized chlorine products such as DiChlor and TriChlor are a simple way to insure levels of both Chlorine and Stabilizer are kept within the recommended levels.

Stabilizer is toxic and actually diminishes the effects of chlorine by slowing down its reaction with wastes.  Therefore, there is no reason to keep the levels above 50 PPM.  Some local governments restrict or prohibit the use of Stabilizer in commercial pools.

Stabilizer is treated as a water balance factor because it affects the Total Alkalinity test results at different PH values. 

Formula: Adjusted TA  =  TA - (Stabilizer X Stabilizer Factor)

Total Alkalinity Adjustment Factors:

PH Cyanuric Acid Factor
7.0 0.22
7.2 0.26
7.4 0.30
7.5 0.32
7.6 0.33
7.8 0.35
8.0 0.36


100 - (40 * 0.32) =  87 PPM Adjusted Total Alkalinity


Perfect Pool and Spa Software! Users: Just enter test results.  This is done automatically for you.  DO NOT ADJUST! 

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