What chemical is commonly used to increase pH?

Sodium carbonate, often referred to as soda ash, is commonly used to raise the pH levels in swimming pools. When the pH of pool water is too low, it can lead to issues such as corrosion of equipment and irritation to swimmers' skin and eyes. Sodium carbonate acts as a base that neutralizes acidity, thereby helping to elevate the pH back to the ideal range of 7.2 to 7.8.

The properties of sodium carbonate allow it to efficiently interact with the water's hydrogen ions, resulting in a reduction of acidity and an increase in pH. This makes it a preferred choice for pool operators looking to maintain balanced water chemistry and create a comfortable swimming environment.