You've heard it all: "I told you to clean the fucking swimming pool!" But how do you clean it? What is the best method? Fortunately, there are several options. A good first step is to shock the water with sodium hypochlorite, a pool disinfectant that raises free chlorine in a matter of minutes. Once the chlorine levels reach two ppm, hold them there for 25 to 30 minutes. Read the instructions for shock treatment for your particular type of contamination..