Do you have to dissolve shock before putting in pool?

No, you should not dissolve shock before putting it in the pool. Shock, or calcium hypochlorite, is a powerful oxidizing agent that can cause significant damage to the pool liner and equipment if it is not used correctly. It should be added directly to the pool water, but it is important to follow the directions on the product label regarding how much to add and how to use it. The shock should be added to the pool water while the pump is running, and it should be allowed to circulate for at least 24 hours before swimming or using the pool.