What chemical can be added to raise the pH of swimming pool water?

Soda ash, also known as sodium carbonate, is a chemical commonly used to increase the pH levels in swimming pool water. When pool water becomes too acidic, it can lead to various issues such as skin and eye irritation, corrosion of pool equipment, and decreased effectiveness of chlorine. By adding soda ash, which is alkaline, the pH level can be effectively raised toward the ideal range of 7.2 to 7.8.

This adjustment helps ensure a safe and comfortable swimming environment, as well as maintaining the stability of chlorine levels in the water. The other chemicals listed may serve different purposes; for instance, bromine is a sanitizer, sodium chloride is used in saltwater pools for chlorine generation, and muriatic acid is actually used to lower pH levels, not raise them. Understanding the specific uses of these chemicals is crucial for proper pool maintenance and water chemistry management.