Swimming Pool Calcium Deposits. The longer they are on your pool surfaces, the harder they will be to remove and the greater chance they will cause permanent damage. You can use vinegar to help remove the spots as well. Pebbtec and calcium deposits Post by czechmate » Wed 02 Jun, 2010 18:24 I have CH about 550, so trying to postpone partial draining I am lowering PH to 7.4, added salt to 1500ppm. The calcium caused by hard water isn’t dangerous, but it can detract from the attractiveness of the pool. Constant temperature changes along with rapid evaporation will cause deposits to settle along the side your pool wall. When there is a whitish mineral residue on the grout, commonly this is caused by efflorescence. I also recently discovered white flakes below pool returns, apparently its calcium flakes from the salt cell. Calcium scaling isn’t fun for anyone. Calcium deposits normally look something like this in concrete swimming pools: 1) Hard white balls/spots. Brush briskly to get through the calcium deposits and remove them properly. I would not leave the calcium deposits on too long. A higher ppm causes deposits on the surface and cloudy water. Have you noticed small white nodules in various areas around your pool. Sometimes they appear as worm-like lines on the surface of concrete, pebblecrete, or plaster, pools. Brushing will also remove any algae build up. Once you have brushed the calcium deposits away, test your water pH levels. Either way, they’re not exactly aesthetically pleasing. "How do you remove calcium deposits on a pool liner?" I have just had a salt system installed and discovered this. But that’s not the worst part. It's a natural, and to some extent, an inevitable process. It dirties your pool walls with unappealing, chalk-white deposits along the water line. 2 – 6 mm in diameter) that appear randomly over the walls and floor of your pool and are difficult to brush away. Calcium is the mineral with which most people are familiar, but other ones common in pools are phosphates, silicates and sulfates. If left in place, calcium deposits can also build up, causing filter failure. For this, you'll need to partially drain your pool. Fortunately, there are ways to keep those white spots off your pool liner, without damaging it. When this happens it often leaves a white gritty layer. The science behind calcium nodules and how they can affect your pool Previous Next As many pool owners will tell you, there are a number of pool maintenance tasks that will need to be performed by Dallas/ Fort Worth pool professionals, but one development that befuddles many homeowners is the presence of calcium nodules. As soon as they are obvious, balance your pool chemicals and remove the deposits. You will prevent any other method of calcium removal from being effective without severe risk of removing all coloration from the tile. The optimal calcium level is 200-400 ppm. 1.) These deposits cab show up as white scale on tile, ladders, pool lights and other surface as is caused by improper water in-balance, in particular high pH and Calcium. As the picture shows, this white layer becomes very noticeable when the pool water drops below its normal level.