What are the forms of chlorine used to treat public swimming pool?

- Chlorine gas: This is the most common form of chlorine used in public swimming pools. It is a highly effective disinfectant and can quickly raise the chlorine levels in the pool. However, chlorine gas is also highly toxic and can cause respiratory problems if not handled properly.

- Sodium hypochlorite: This is another common form of chlorine used in public swimming pools. It is a liquid form of chlorine that is less toxic than chlorine gas but still very effective at disinfecting water. Sodium hypochlorite is often added to swimming pools through a chemical feeder.

- Calcium hypochlorite: This is a solid form of chlorine that is often used in outdoor public swimming pools. It is less soluble in water than sodium hypochlorite, so it releases chlorine more slowly. This makes calcium hypochlorite a good option for pools that are not used as often.

- Trichloroisocyanuric acid: This is a stabilized form of chlorine that is often used in public swimming pools. It is a slow-dissolving solid that releases chlorine over a period of time. Trichloroisocyanuric acid is a good option for pools that are used frequently.

The type of chlorine used in a public swimming pool will depend on the specific requirements of the pool.