Shocking is also known as super chlorinating. It’s a way to keep pool water safe and clean by adding three to five times the normal amount of chlorine or other chemical sanitises to the pool water to drastically raise the chlorine level for a short time.
This will help to remove ineffective chlorine amounts, kills bacteria and anything organic in the pool, and boosts the availability of effective chlorine. Shocking the pool is an important regular maintenance step with which every pool owner should be familiar.