Conversely, there is no simple chemical addition that can be made that will reduce calcium hardness. The only way to reduce calcium hardness levels in pool . Jump to Adjust the calcium hardness level - These are symptoms of swimming pool water that is unbalanced. The recommended range is 150-400 ppm (parts per million), with an often cited stricter range of 200-400 ppm. Keeping your calcium hardness in the midpoint between the low and high should be your goal. Although soft water is desirable in everyday home use, calcium hardness is necessary in pool water. With sufficient levels of calcium dissolved, the aggressive . Calcium hardness is the measure of how hard or soft your pool water is, and how much calcium is dissolved in your pool water. Ideally, you should strive to have your calcium hardness levels at 150 – 400 ppm with your ultimate goal being to try to keep it right in the middle of that figure. Nov 20, 2017 - Good calcium hardness levels make managing pool chemistry so much . California, and our weather is pretty awesome, most of the year. Low Calcium Hardness. When pool water becomes too soft (i.e. its calcium hardness drops below 150 ppm) it becomes corrosive. A pool that is balanced has proper levels of pH, Total Alkalinity, and Calcium Hardness. It can also be defined as water that is neither corrosive nor scaling. Jan 5, 2010 - Fiberglass pools can become etched and lose some of the gelcoat gloss when Calcium Hardness levels are too low. This is known as a . Calcium hardness must be actively managed—along with pH and total . only the calcium component is relevant in the water balance calculation for pools and spas. . factor in the test instructions to determine the calcium hardness level. Mar 23, 2009 - Calcium hardness refers to a chemical imbalance in the level of calcium in your pool water. In order for you to protect your swimming pool .