What can be used to remove iron stains from pool surfaces?

Chelating agents are effective in removing iron stains from pool surfaces because they work by binding to metal ions, such as iron, and rendering them soluble, which allows for easier removal. When applied to stained surfaces, these agents chemically interact with the iron particles, effectively lifting them away without damaging the pool surface. This process distinguishes chelating agents as a specialized solution for metal stain removal, making them particularly useful in pool maintenance.

Other options, like calcium deposits, typically pertain to scaling rather than stains and do not provide a direct solution for iron removal. Oxidizers are primarily used for sanitizing and chlorination, and although they might help in some stain scenarios, they are not specifically designed for metal stains. Acid solutions can be effective in removing certain types of stains but may also damage the pool surface or the pool equipment if not used correctly. Thus, the use of chelating agents stands out as the most appropriate and safe choice for handling iron stains in pools.