Chlorine is the most common pool chemical used to disinfect water and eliminate harmful bacteria

https://wiki-cafe.win/index.php/Clearer_Water_Awaits:_Finding_the_Right_Clarifier_for_your_Manitoba_Swimming_Experience.

Chlorine is the most common pool chemical used to disinfect water and eliminate harmful bacteria. Regularly monitoring chlorine levels ensures a healthy swimming pool, protecting users from potential infections and illnesses.