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      Living in the Southwest United States we deal with high levels of calcium in our tap water. This is also commonplace in Arizona, Nevada, Texas as well! The tap water is loaded with calcium, magnesium and other hardness minerals. When this water is introduced into your swimming pool it is usually harder than what is recommended for your pool (200 – 400 parts per million). This is a challenge for most swimming pool owners because as water evaporates, the hardness minerals remain in solution and gradually rise in concentration. When Calcium Hardness (CH) gets into the area of 600 parts per million (ppm) and higher scaling will begin to occur on the water tile line, the interior finish of the swimming pool, pool filtration equipment, spillways and decorative water features. Depending on the color of tile, the extent of your water features and how long you leave your current water in the pool is directly proportional to how much calcium scaling you will have and how difficult it will be to remove it!

      Typically, if you wait many years with hard water in your swimming pool (as many residential swimming pool customers do) you will need to call a professional to come and remove it from the surface of your swimming pool. Depending on how thick it is will determine the price and the more areas affected will cause the price to rise. This can be quite an expensive investment if you don’t keep it under control. One way to do this would be to get in the habit of changing out the water in your swimming pool every two years and at Pure Water Industries, we recommend recycling your water instead of a typical drain and refill because we can give you better water than tap and we can also conserve up to 85% of the existing water in the swimming pool. Just last week we got a call from a customer who was complaining of calcium staining on their water tile line and spillway from their spa, which shows up more because of the dark tile. When we showed up, we measured the following values:

      Initial Chemistry:

      Calcium Hardness: 860ppm

      Total Dissolved Solids: 8879ppm

      Cyanuric Acid: 100ppm

      After filtering this 14,000-gallon swimming pool for 14 hours because of the high TDS we left the customer with the following ending chemistry….

      Calcium Hardness: 130ppm

      Total Dissolved Solids: 777ppm

      Cyanuric Acid: 592ppm

      Our customer who was dealing with high Calcium Hardness and TDS levels now have the best water quality to swim in. By using the Puripool Reverse Osmosis (RO) filtration process they were also able to conserve 85% of the existing water in the pool. If you should have any questions or want to swim in better quality water, please contact us today!