How to Lower Chlorine in a Pool

Method 1: Using Sodium Thiosulfate

1. Turn off the pool's chlorinator. This will prevent more chlorine from being added to the pool while you are working.

2. Test the pool water. This will help you determine how much sodium thiosulfate you need to add. The ideal chlorine level for a swimming pool is between 1 and 3 ppm.

3. Calculate the amount of sodium thiosulfate you need to add. The formula is:

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Amount of sodium thiosulfate needed (in ounces) = (Current chlorine level - Desired chlorine level) x Pool volume (in gallons) / 10

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For example, if your pool holds 10,000 gallons of water and your current chlorine level is 5 ppm and you want to lower it to 3 ppm, you would need to add 2 ounces of sodium thiosulfate.

4. Dissolve the sodium thiosulfate in a bucket of water. Stir until it is completely dissolved.

5. Add the dissolved sodium thiosulfate to the pool. You can do this by slowly pouring it around the perimeter of the pool.

6. Circulate the pool water for at least 15 minutes. This will help to distribute the sodium thiosulfate throughout the pool.

7. Test the pool water again. The chlorine level should now be lower. If it is not, repeat steps 4-7.

Method 2: Using Chlorine Neutralizer

1. Turn off the pool's chlorinator. This will prevent more chlorine from being added to the pool while you are working.

2. Test the pool water. This will help you determine how much chlorine neutralizer you need to add. The ideal chlorine level for a swimming pool is between 1 and 3 ppm.

3. Add chlorine neutralizer according to the product's instructions. Typically, you will add the chlorine neutralizer directly to the pool water.

4. Circulate the pool water for at least 15 minutes. This will help to distribute the chlorine neutralizer throughout the pool.

5. Test the pool water again. The chlorine level should now be lower. If it is not, repeat steps 3-5.

Note: It is important to lower chlorine levels gradually to avoid causing any damage to the pool or pool equipment. It is also important to make sure that the chlorine level never drops below 1 ppm, as this could allow harmful bacteria to grow in the pool.