What chemical is typically used to raise the pH level in pool water?

Sodium carbonate, commonly known as soda ash, is used to raise the pH level in pool water. When pH levels are low, it can lead to corrosive water conditions, which may damage pool surfaces and equipment, and can also cause skin and eye irritation for swimmers. Soda ash is effective because it provides a strong alkaline solution that increases the pH without significantly affecting the total alkalinity of the water.

Understanding the role of pH control in maintaining safe and clear pool water is essential for pool maintenance. Sodium carbonate not only elevates pH but also helps in stabilizing water chemistry. This is important for ensuring that disinfectants, like chlorine, work effectively, and for keeping the water balanced and comfortable for users.

Other chemicals mentioned may serve different purposes; for example, calcium chloride is primarily used to raise calcium hardness in the water, while sodium bicarbonate, or baking soda, is commonly used to raise total alkalinity rather than directly altering pH levels. Chlorine is a sanitizer that helps keep the pool water clean but does not serve to raise pH levels. Thus, sodium carbonate is the suitable choice for raising pH.