What is the proper way to chlorinate a pool?

Adding chlorine in the evening is the proper way to chlorinate a pool because it allows for better absorption and effectiveness. During the day, particularly when the sun is shining, ultraviolet (UV) light can break down chlorine, reducing its efficacy and making it less effective at sanitizing the water. By chlorinating in the evening, the chlorine has the opportunity to properly mix and kill bacteria and other contaminants without being significantly degraded by sunlight. This timing also ensures that the pool water maintains the desired chlorine level when swimmers are in the pool, promoting a safer swimming environment.

In contrast, adding chlorine in the morning may lead to a rapid loss of chlorine concentration due to UV exposure throughout the day. Chlorinating while the pool is in use can be unsafe for swimmers, as the chemicals can irritate skin and eyes, and the adjustment might not be effective if the pool is disturbed by activity. Using gas chlorine can offer quick results, but it also has additional handling safety risks and may require specific equipment for proper application, which is not always practical for every pool setting.