Which chemical is commonly used to disinfect swimming pools?

• A. Chlorine Dioxide
• B. Calcium Hypochlorite
• C. Bromine
• D. Hydrogen Peroxide

Answer: (B)

Calcium Hypochlorite is widely recognized as a common disinfectant for swimming pools because it is effective at killing bacteria, viruses, and algae. It is available in granular form and can be easily stored and transported. Once added to water, it releases chlorine, which sanitizes the pool by destroying harmful microorganisms.

This compound has a high available chlorine percentage, making it potent and reliable for maintaining proper water quality. Additionally, Calcium Hypochlorite is relatively stable and can be used in various water conditions, making it a preferable choice among pool maintenance professionals.

Other disinfectants, like Chlorine Dioxide and Bromine, are also used for pool sanitation but are less common compared to Calcium Hypochlorite for regular pool maintenance due to factors like cost, handling, and effectiveness under certain conditions. Hydrogen Peroxide is not routinely used for swimming pools; while it does have disinfectant properties, it is more often seen in other applications such as cleaning and sanitizing surfaces rather than long-term water treatment in pools.