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Certified Swimming Pool Stain Removers
Total Alkalinity Total alkalinity (TA) is closely linked to pH because chemicals or acids that lower pH will also lower total alkalinity.  This principle of chemistry often leads to some confusion among pool owners.  Just like pH, total alkalinity is lowered with muriatic acid and is raised with sodium bicarbonate (buffer).  If the total alkalinity of your pool water is too low, the water becomes very sensitive to acids.  This can lead to sudden and pronounced changes in the water’s pH levels, even when only small amounts of acid are added.  Low total alkalinity can also cause damage over time to the plaster in your pool and to your pool equipment.  This is because the water is ‘seeking’ alkaline salts (alkalinity) and will extract them from the alkaline rich cement within the pool plaster.  Due to this, the water will start to dissolve the concrete over time.   If your pool surface feels like it is breaking down or there is sandy material in your filters, it may be worth checking the alkalinity levels in your pool water. If the total alkalinity is too high, it can lead to pH lock.  This means that the pH level in your pool may become difficult to change even after large volumes of acid are added to the water.  High total alkalinity can also cause the build-up of calcium and metal stains in your pool.  Calcium build-up on the walls and floor of the pool can lead to the surface of your pool feeling rough.  It can also lead to the formation of white spots on the plaster surface of the pool.  It’s important to keep in mind that most stains in swimming pools are caused by high pH.  
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