How To Prevent Calcium Hardness Buildup On Your Swimming Pool

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A 30,000-gallon swimming pool with high calcium hardness that was recycled using our Puripool Process!

Calcium hardness can be extremely challenging to handle especially when those levels get high! According to most pool professionals, online resources and printed material the optimal calcium hardness for a swimming pool is between 200 – 400 parts per million (ppm). When hardness levels climb above 600ppm your water should be changed out to prevent calcium scaling on the water tile line, interior finish, filtration equipment, spillways and decorative water features. Most swimming pool owners aren’t aware of this until the scaling has occurred and they need to spend a lot of money to have it removed. In the future, keep 600ppm as a guideline to prevent heavy scaling.

Our tap water is loaded with calcium, magnesium and other hardness minerals which cause major issues to swimming pools and water chemistry. When you spend a lot of money on your swimming pool it would be wise to change out the water on average every two years to keep it looking great and feeling nice all the time. This can be done by recycling your swimming pool using Reverse Osmosis (RO) Mobile Filtration. At Pool Services Technologies, we utilize RO filtration by bringing our mobile trailer to your residential or commercial swimming pool and recycling the water on site. This is much better than a drain and refill because we can finish most residential jobs in less than a day and we put drinking quality water back in your swimming pool which is much better than our tap water in the San Diego. The Puripool Process can be performed on both chlorine and salt pools as well as any type of pool. Since the water level never changes in the swimming pool, this process can be performed 365 days of the year and you can even swim in the pool during filtration!

Just this past week we were called out to a 30,000-gallon swimming pool with hardness just at the point where a water change should occur. The initial chemistry in the pool was as follows:

  • Calcium hardness – 600ppm
  • Total Dissolved Solids – 5212ppm
  • Cyanuric acid – 20pppm

After filtering this swimming pool for 19 hours we left them with the following chemistry:

  • Calcium hardness – 130ppm
  • Total Dissolved Solids – 613ppm
  • Cyanuric acid – 0ppm

This water is much better than tap. This customer is good for about two years unless they want us back sooner. With any swimming pool, change out the water every two years. This will prevent issues down the line dealing with calcium and you will love the feel of the water too! So, if you want to swim in the best quality of water now, contact us today for an appointment!


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