How to Use Liquid Chlorine in My Inground Pool

Liquid chlorine is used to disinfect swimming pools. Liquid chlorine should be added to your pool when you open it in the spring. Add it when you empty and refill your pool with fresh water. Use liquid chlorine to kill algae and clear up an abundance of minerals if your pool becomes heavily polluted. Liquid chlorine can be used in place of pool shock to maintain appropriate chlorine levels. Liquid chlorine is only meant for use in pool water. Always read the directions on the bottle before adding it to your pool.

Things You'll Need

  • Chlorine test kit
  • Chemical bucket
  • Liquid chlorine


    • 1

      Purchase liquid chlorine and a chlorine safe measuring bucket from your local pool supply store. You can substitute a chlorine safe bucket with a thick plastic measuring bucket. You can find these at your local home supply store.

    • 2

      Buy a test kit from your local pool supply store or bring a few cups of pool water to the store to be tested for available chlorine. If using a home kit, follow the directions carefully. Tests usually consist of adding pool water to a vile and then place a few drops of a solution in the vile and swirling to mix. Compare the resulted color of the water to the color chart provided with the kit. The chlorine should range between 1.0 and 3.0 parts per million (PPM).

    • 3

      Add 52 to 104 ounces of liquid chlorine to your pool's deep for every 10,000 gallons of water. Pour the chlorine as far from the pool edge as possible while running the filter. Do so every 7 days or whenever test results show chlorine levels to be below 1.0 PPM. Leave the filter on for 6 to 8 hours. This will boost your pool's chlorine level to between 5 and 10 PPM. Do not allow anyone to swim in the pool for at least 24 hours or until the chlorine level is back to normal.

    • 4

      Store the remaining chlorine in a cool, dry place out of the reach of children and never in direct sunlight.

Tips & Warnings

  • Never add chemicals to your pool when there are swimmers present. You must allow chlorine levels to return to normal before adding any other chemical to your pool. The use of other chemicals and liquid chlorine can cause dangerous gaseous fumes and explosions.
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  • Photo Credit eau de piscine 2 image by Nathalie P from

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