How much shock treatment for 3900 gallon water?

The recommended amount of shock treatment for a 3900-gallon pool is approximately 12 ounces of unsweetened granulated baking soda or calcium hypochlorite. Shock treatment is typically used to raise the chlorine levels in a pool quickly, in order to kill bacteria and other contaminants. It is important to follow the manufacturer's instructions when using shock treatment, and to test the pool's chlorine and pH levels before and after treatment.