What does superchlorination or shock refer to?

Superchlorination, commonly referred to as "shock," involves adding a sufficient amount of chlorinating compound to the pool water to elevate the chlorine level significantly, usually to eliminate contaminants such as bacteria, algae, and other organic matter. This process aims to restore water clarity and ensure a safe swimming environment by effectively breaking down combined chlorine and any chloramines, which are less effective disinfectants.

The focus is on introducing a high concentration of chlorine for a short period of time, which helps in oxidizing and sanitizing the water. This method is crucial after heavy usage, rainstorms, or any event that induces high levels of organic material in the pool water, ensuring that the water remains hygienic and pleasant for swimmers.