One to five parts per million.
swimming pool
Swimming in a pool with high free chlorine can cause skin and eye irritation. It is recommended to wait until the chlorine levels have returned to normal before swimming in the pool to avoid any discomfort or potential health issues.
To increase the chlorine level in a swimming pool, you can add chlorine tablets, liquid chlorine, or granular chlorine according to the manufacturer's instructions based on the pool's size and the current chlorine level. It's important to regularly test the water to ensure the chlorine level is within the recommended range for safe swimming.
To disinfect it.
Chlorine is added to swimming pool water to disinfect it.
It is necessary because the chlorine kills all of the germs that enter the swimming pool.
If your talking about Swimming pool its because your pool has chlorine in it and chlorine kills fish :(
chlorine
The swimming pool at the Landmark Hotel in London is 15-metres. It's a heated and chlorine-free swimming pool. One can enjoy swimming in this pool without worrying about the side effects of chlorine, especially if one is pregnant.
The liquid chlorine formula used for swimming pool maintenance is typically sodium hypochlorite (NaClO).
The ideal free chlorine level for a swimming pool is typically between 1 to 3 parts per million (ppm). This range helps effectively sanitize the water, preventing the growth of harmful bacteria and algae. Maintaining this level ensures a safe and comfortable swimming environment while also protecting pool equipment and surfaces. Regular testing and adjustment are essential to keep chlorine levels within this range.
Lots o filtering.