How much chlorine should I add to my 24′ by 4′ pool right after fiiling the pool with water?


Enough to establish 1 to 3 ppm of free chlorine. The exact amount will depend on the type of chlorine (there are several) and the demand of the water (well water, city water, etc.). You should find dosage information on your packaging or consult one of the online calculators for an approximate dosage.