Home Home About Stains About Stains Chemistry Chemistry What We Do What We Do Gallery Gallery About Us About Us Contact Contact
Certified Swimming Pool Stain Removers
Calcium Staining
Calcium Staining Calcium stains (or scale) are fairly common, particularly in pools with brand new plaster.  New plaster takes time to fully cure.  The curing process causes the pH in pool water to rise.  When this occurs, white calcium carbonate deposits form and embed on the walls and floor of the pool.  One way to tell if your pool has calcium is to look in your chlorinator elements (near the filter) to see if there is any white build-up of calcium. Existence of a white, frosty build- up in the elements will prove that the water has been (or still is) out of balance and has allowed calcium carbonate to form.  Another way to tell if your pool has calcium is to feel the surface of your pool plaster.  Calcium will feel very rough and sometimes even sharp as the crystals adhere to the surface of the plaster. Calcium carbonate is resistant to traditional stain treatments such as chlorine and firm brushing.  In order to control this rapid rise in pH, daily doses of pool acid are required to keep the pH of the pool water at the suggested level of 7.4.  Calcium stains is fairly common, particularly for brand new pool plaster.  New pool surfaces will experience rapidly rising pH and daily doses of pool acid will be reqired to keep the pH of the water at the suggested 7.4. The most common types of calcium Calcium stains can appear on most pool interior types including tiled pools, 3M colorquartz, pebble, fiberglass and glass bead surfaces. It may show up in any of the following ways: 1) Hard white balls/spots about the size of a pea (approx. 1/8 inch in diameter) that appear randomly over the walls and floor of your pool.         2) White icicles (approx. 1/4 inch wide and up to 1 inch long) can appear to be 'growing’ out of the walls or floor of your pool. If calcium reappears in the same section of the pool after it has been removed then this could be an indication that your pool surface has split away (delaminated) from the pool structure itself.  Please contact us if you suspect you have this issue in your pool. 3) Brown/grey cloudy stains.  Calcium carbonate is always white, however, as it forms its crystalline structure it will occasionally capture dirt, metals or copper. This dirt discolors the calcium carbonate which gives a brown or grey appearance. 4) Cloudy white blotches or swirl marks (typically on the bottom of your pool) can also be an indication of calcium staining as it forms a light film on the surface of the pool and highlights the imperfections in the pool surface. Some of our clients will say that their pool looked great at first, but later on they can see swirl marks, ridges, trowel marks or even footprints that have appeared at a later stage.
How can the Pool Stain Removers help to remove calcium stains? Calcium scale can be an expensive problem for pool owners if it is not treated properly.  Calcium can build up in the plumbing (restricting water flow) and permanently damage and reduce the life of your chlorinator cell and pool equipment.  We can remove visible calcium from your swimming pool and show you how to keep it away.
Calcium build-up on salt chlorinator cell.  
Calcium hydroxide bleeding from the base of waterline tiles area depositing on the pool surface.  
calcium nodules in swimming pools
This pool has over 700 calcium carbonate deposits on the grey plaster. If not treated, the calcium will push the plaster surface away from the pool shell.
Calcium spot in swimming pool 0416 927 837 Speak with a technician now.