There are three distinct forms of calcium carbonate that we commonly find in swimming pools. They are carbonate scale, calcium crystals [calcite], and the topic of today’s article, calcium dust.
Sodium carbonate (Na2CO3), more commonly known as Soda Ash, is an additive to raise the pH and alkalinity in swimming pools. Soda Ash has a high pH, somewhere between 11.3-11.7. Those of you reading this who have used Soda Ash may have had it cloud up a pool. This article will explain why that happens, but first let’s explain how Soda Ash impacts pH and alkalinity in water.