If you have too much calcium and magnesium dissolved in your water, then water is . If you need a little background information on calcium hardness, I explain . What Happens If It's Too Soft. If your water is too soft, meaning the calcium hardness levels have fallen below 150 ppm in your pool, the water will become corrosive. When it does, it can begin to dissolve the concrete and begin to corrode metal in your pool resulting in potentially expensive pool repairs down the road . Jan 26, 2016 - Hard pool water has elevated levels of calcium and magnesium, as measured by a Total Hardness test, also known as Calcium Hardness. For swimming pools, the range of acceptable hardness levels is 200-400 ppm, although many suggest a tighter range of 180-220 ppm for plaster pools and 150-250 ppm for vinyl pools. Jul 25, 2015 - So, too much calcium hardness is a bad thing. How much is too much? Normal range for swimming pools is 180-220 ppm, although some people say 200-400 ppm. Anything north of 500 ppm would be considered very high, but there are pools that can run higher than that without problems. Jul 11, 2014 - It says; 'Check the water hardness to prevent damage to your pool or hot tub. When the . When the hardness level is too high, ugly scale deposits can develop. If the hardness is too http://www.euro-inox.org/pdf/map/pap. Apr 4, 2017 - Hard water at home means that it has higher amounts of dissolved calcium in the water . So we know that alkalinity affects the stability of pH in our pools. . I am a writer by background, and an aquatics professional by choice. Good water balance, balancing swimming pool water, pH, total alkalinity, calcium hardness, stain, scale, . they need to balance their water!) or scale build-ups (high pH, high Total Alkalinity, high Total Hardness) . PLEASE tell us this information when you contact us so that we can better help you. US Water Hardness Map. A pool that is balanced has proper levels of pH, Total Alkalinity, and Calcium . If these levels are too high, the water becomes saturated and will throw off excess . If too much calcium chloride is added, the water can be diluted by adding more to the pool. . When calcium hardness is too low, water can leach calcium from pool Positioning, ventilation, site layout and overall location are critical to a safe . Jump to Calcium hardness in swimming pool water - Calcium hardness refers to the amount of the mineral calcium dissolved in your water. Low calcium levels will deteriorate pool surfaces, while high . Ways to maintain pool water quality may include: . the pH and chlorine twice daily in very hot weather.