How to Remove Copper from Pool Water

During the summer months when the swimming pool is open, you might hear some family members or guests complaining about their hair turning green or their swimming suits having a green tint. You may be quick to blame the chlorine, but the culprit is typically the copper in the pool water. Copper can enter the pool in many ways, including when you add tap water to the pool. After time, the amount of copper can build up because it does not dissipate. Get rid of copper by adjusting the pool chemicals.

Step 1

Test the pool water using copper test strips. Dip the test strip in the water for five seconds. Remove the strip from the water and shake once. Wait for about 15 seconds and compare the color on the strip to the color chart that comes with the kit to see if there is copper in the pool. The level of copper in a pool should be zero.

Step 2

Test the pH in the pool. To counteract the copper in the pool water, the pH should read 7.2 to 7.3. Test the calcium hardness using a calcium test strip. The hardness level to fight copper build up in the pool should be 350 parts per million (ppm). If the pH needs to be adjusted or the calcium hardness needs to be raised, continue to the next steps.

Step 3

Turn on the pump so it is filtering. Allow the pump to run for at least eight hours.

Step 4

Raise calcium hardness by using calcium chloride. Generally, keep the calcium hardness at about 250 ppm. Use 2 oz. of calcium chloride per 1,000 gallons of water to raise the calcium hardness 10 ppm. Raise the level by 20 ppm using 4 oz. or by 50 ppm by using 10 oz. per 1,000 gallons of water. Sprinkle the powder into the deep end of the pool.

Step 5

Lower the pH to 7.2 or 7.3 using muriatic acid. Add one gallon of water to a bucket. Add the correct amount of acid to the water in the bucket. Use 1-1/4 oz. muriatic acid per 1,000 gallons of water in the pool if the pH is between 7.6 and 7.8. Use 1-1/2 oz. of acid per 1,000 gallons of water in the pool to lower the pH if the test reading was 7.8 to 8.0. Pour the solution in the deep end of the pool, keeping the solution away from pool walls and fixtures.

Step 6

Raise the pH if the reading is lower than 7.2 by adding soda ash. Use 3/4 oz. of soda ash per 1,000 gallons of water in the pool if the pH is 7.0 to 7.2. Use 1-1/4 oz. of soda ash per 1,000 gallons of water in the pool if the pH test reading is 6.6 to 7.0. Pour the soda ash into the deep end of the pool.