Calcium content is best in the range of 100-400 ppm and is water . The only way to reduce calcium hardness levels in pool water is through dilution with water . 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. If the pool water becomes too hard (calcium hardness greater than 400 ppm) Cloudy pool water.Your pool can only hold so much calcium in your pool, dissolved as a calcium salt, before it reaches its saturation point. Water Scale.Excessive hardness in a swimming pool left untreated can result in water scale. Calcium, often referred to as calcium hardness, is one of those chemicals that could . a better understanding of pool water chemistry and the products available. When pool water becomes too soft (i.e. its calcium hardness drops below 150 ppm) it becomes corrosive. If you don't manually add calcium or magnesium back into the pool, the water will begin to take what it needs from any part of your pool or pool equipment that contains them such as stone, concrete, metal, grout, etc. Nov 20, 2017 - Until recently, I underestimated how important calcium hardness is for water chemistry. Good calcium hardness levels make managing pool . While hardness in water consists of both calcium and magnesium salts ('total . calcium component is relevant in the water balance calculation for pools and spas. . Calcium hardness is best monitored with a drop-count titration, as test strips . How to remove or lower calcium hardness levels in pools, and tips for maintaining a pool with calcium hardness levels of 400-800 ppm. . thing with a hard water pool is to make regular use of a good Stain & Scale chemical, aka sequestrants . Jan 26, 2016 - Controlling & Reducing Calcium Hardness levels in swimming pools. . The best method is to drain a portion of the pool and refill with water . Total alkalinity a measure of the amount of alkaline substances in the water. The calcium hardness a measure of the amount of lime dissolved in the water.