To keep a pool clean naturally, consider using alternatives to chlorine such as salt water, ionization, or ozonation systems, and regularly cleaning and maintaining pool equipment.
The chemicals needed for a pool can vary based on pool size, usage, and water quality. It is recommended to regularly test the water and adjust chemicals as needed.
To keep pool water blue, regularly test and balance pool chemicals, regularly clean and maintain pool equipment, and use a pool cover to prevent debris and evaporation.