How to Reduce Calcium in a Swimming Pool
Calcium hardness in a pool is treated with calcium chloride to raise the hardness level and with anhydrous trisodium phosphate to reduce the hardness level in the pool. Although you can lower the calcium in the pool with chemicals, there is one way to reduce the amount of calcium hardness in the swimming pool without using any chemicals that takes a little time, but is just as effective. The ideal calcium hardness reading is about 250 parts per million (ppm). Does this Spark an idea?
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Instructions
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1
Test the water using a calcium hardness test strip. Dip the test strip in the water as far down as you can reach and pull it out. Place the strip up against the color chart in the test kit. If the reading indicates that the hardness level is above 250 ppm, continue reading.
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2
Rent or purchase a submersible sump pump. Local equipment stores carry sump pumps or you can buy one at your local pool dealer.
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3
Attach the garden hose to the pump. Place the other end of the hose away from the pool. Plug in the pump to a power source. Turn on the pump and lower it into the water about 6 inches. Place a heavy object on the garden hose to hold the pump in place.
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4
Continue to run the pump until you have removed at least 6 inches of water from the pool. If the calcium hardness reading was over 300 ppm, you should remove 12 inches of water. Measure how much water is being removed in the shallow end of the pool. You never want to remove more than half of the pool water in the shallow end.
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5
Pull the pump out of the water when done. Turn off the pump and unplug it. Unwind the garden hose from the pump and place the end in the pool. Attach the other end of the hose to the water faucet. Turn on the water. Fill up the pool to the required water line.
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6
Retest the calcium hardness again. Assuming that the reading is about 250 ppm, you are done. If the reading is still high, wait for two to three days and repeat steps 3 to 5.
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