How to Test High Pool Chlorine Levels Using Dilution


The chlorine level in a swimming pool should be maintained between 2 to 3 parts per million (ppm) to ensure balanced water. The chlorine level is tested at regular intervals using a swimming pool chemical test kit. Many standard test kits will not test water that has a chlorine level that is extremely high. It is important to know the level of the chlorine before adding chemicals to bring it into balance. A method called dilution is employed to test high levels of chlorine in pool water.

Things You'll Need

  • Pool test kit
  • Distilled water
  • Fill the test vile from the kit half full of pool water. Take the water from 18 inches below the surface of the water to ensure a good sample.

  • Add distilled water to fill the test vile the rest of the way.

  • Shake the vile to mix the liquids thoroughly.

  • Squeeze the reagents into the vile according to the instructions on the test kit you are using. Shake the vile to mix the reagents.

  • Read the number on the vile that corresponds to the color of the liquid. Multiply the number by 2; this is the true level of chlorine in the water. For example, if the liquid tests at 6 ppm, the true level is 12 ppm.

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