How to Lower Chlorine Levels in an Above-Ground Pool

Chlorine levels in an above-ground pool become too high most often when owners "shock" the pool when opening it up for the first time in the beginning of the season. In order for people to safely swim in the pool, the chlorine level must come down to around 3 parts per million (ppm). Chlorine levels higher than 3 ppm can cause irritation (sometimes severe) to ears, eyes, nose, throat and skin.

Things You'll Need

  • Water chemistry test kit
  • Chlorine neutralizer
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Instructions

    • 1

      Determine the water chemistry. Using a water chemistry test kit, follow the instructions to get the chlorine level. If the total chlorine level exceeds 3 ppm, the chlorine levels are too high.

    • 2

      Uncover the pool. If the total chlorine level is close to 3 ppm, simply uncover your pool for two to three days and allow the sun's ultra violet rays to breakdown the chlorine levels. Retest after the second and third day.

    • 3

      Add chlorine neutralizer. If the chlorine level in your above ground pool measure significantly above 3 ppm, you have to add a chlorine neutralizer. See Additional Resources to find out where to purchase chlorine neutralizer.

    • 4

      Drain and refill. If you still need to lower the chlorine level in your above ground pool after uncovering it and/or adding a chlorine neutralizer, drain 1/4 to 1/2 of the water out and refill it with fresh water.