Swimming Pool Soda Ash, or Sodium Carbonate (Na?CO?), is a key chemical used to raise the pH and total alkalinity of pool water. Low pH levels make water acidic, which can irritate swimmers’ eyes and skin and corrode pool equipment. Adding soda ash helps restore the pH to the ideal range of 7.2 to 7.6, making the pool more comfortable and protecting its structure. It comes in a white powder form and dissolves easily in water. Soda ash is typically sprinkled evenly across the water surface with the circulation system running. Overuse should be avoided, as it can lead to cloudy water or scaling on surfaces. Regular water testing ensures proper chemical balance and optimal performance of sanitizers like chlorine.