Which chemical is commonly used to balance pH levels in pool water?

Balancing pH levels in pool water is crucial for maintaining water clarity, comfort for swimmers, and the overall effectiveness of sanitizers. When the pH of pool water is too high, meaning it is alkaline, the water can become cloudy, and chlorine may become less effective in disinfecting the water. To counteract high pH levels, acids are commonly used.

Specifically, substances like muriatic acid (hydrochloric acid) or sodium bisulfate (dry acid) effectively lower the pH. These acids work by adding hydrogen ions to the water, which neutralizes the excess alkaline substances and brings the pH level back to the ideal range of 7.2 to 7.8.

Chlorine primarily serves as a sanitizer, impacting the pool's ability to kill bacteria and algae, but does not have a direct role in balancing pH. Algaecides are chemical compounds aimed at controlling algae growth and do not balance pH either. An alkalinity increaser, such as sodium bicarbonate, is used to raise total alkalinity, which can help stabilize pH but does not directly adjust it downward. Therefore, the use of acid is the most direct and effective method for lowering high pH