How To Lower Calcium Hardness and CYA in Pools

As a residential and commercial swimming pool owner in many parts of the country dealing with high levels of Calcium Hardness coming out of your tap water is extremely common. It is loaded with calcium, magnesium, and other hardness minerals. Since we constantly fill up our swimming pools with hard water over time this will cause problems to your interior finish and filtration equipment. If you own a residential or commercial swimming pool have you ever noticed the white ring around the pool or calcium scaling around your water features and salt system if you have one? If so, you’re gonna want to continue reading to prevent expensive repairs to your pool!

Since we fill up our swimming pools with hard water, eventually the Calcium Hardness and Total Dissolved Solids (TDS) levels will increase in concentration. It rises in concentration because as pool water evaporates the hardness minerals remain in solution. As time goes by the water will get to a point where calcium scaling will occur on the water tile line, the interior finish, filtration equipment, saltwater chlorinators, spillways, and decorative water features. When this happens it can be tough to look at and even more challenging to remove. In the swimming pool industry, the normal levels of Calcium Hardness (CH) in water are between 200 – 400 parts per million (ppm) and TDS is recommended to be below 3000 ppm. When these levels get higher than that, most pool professionals will recommend a drain and refill. At Pure Water Industries, we recommend recycling the swimming pool water using the “Puripool Process” Reverse Osmosis (RO) filtration because we can not only give you better water than tap but we can also conserve up to 85% of the existing water in the swimming pool too. This past week, we filtered a 13,000-gallon swimming pool because their calcium, TDS, and Cyanuric Acid (CYA) were high. The following was their water chemistry before and after we started the process:

Initial Chemistry

Calcium Hardness – 840 ppm

Total Dissolved Solids – 5624 ppm

Cyanuric Acid – 200 ppm

After filtering this swimming pool with our mobile filtration system were able to lower those numbers to the following:

Calcium Hardness – 140 ppm

Total Dissolved Solids – 524 ppm

Cyanuric Acid – 0 ppm

By using RO filtration we were able to give the residential swimming pool owners much better water than tap and we were able to complete this job in less than a day. We are superior to a drain and refill because in most parts of the country tap water isn’t as good as the drinking quality water that we can achieve. RO filtration was able to drastically lower the calcium, TDS, and CYA which at 200 ppm can cause challenges with algae.  So, if you want to swim in the best quality and prolong the lifespan of your investment, contact us today to schedule an appointment!