If you live in the Southwest United States dealing with extremely high calcium hardness levels coming from your tap water is the norm. This is, even more, the case if you live in Arizona where our water is extremely hard. 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). In the Greater Phoenix/Scottsdale area, calcium hardness coming out of the tap is anywhere from 400 ppm and higher. 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 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 choose to leave your current water in the swimming pool is directly proportional to how much calcium scaling you will have and how challenging it will be to remove it! Please note, if you need to hire a professional tile cleaner to come in and remove the calcium from the tile, it’s an expensive operation.

Typically, if you wait many years with hard water in your swimming pool 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. One way to prevent this in the future would be to getting in the habit of changing out the water in your swimming pool every two years and at Monarch Pool Service, 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. Last week we processed a 20,000-gallon swimming with extremely high calcium hardness. Upon entry to their swimming pool, we tested their water and found these numbers for their initial chemistry:

Calcium Hardness – 920 ppm

Total Dissolved Solids (TDS) – 3873 ppm

Cyanuric Acid (CYA) – 150 ppm

Phosphates – 500 ppb

After filtering this 20,000-gallon swimming for 16 hours and conserving 16,000-gallons we left our customer with the following ending chemistry:

Calcium Hardness – 180 ppm

TDS – 700 ppm

CYA – 0

Phosphates – 0

Please keep in mind water of this quality is impossible to get out of our tap in the Phoenix area and the surface of the swimming pool is never exposed which is also important to prevent cracking of the liner. If you are curious to know more about this service and how you can swim in the best quality of water, call us today!