What is the recommended method to remove stains from the interior of a pool?

The recommended method to remove stains from the interior of a pool involves draining the pool and performing an acid wash. This approach is effective because it allows for a thorough cleaning of the pool's surface, effectively targeting stubborn stains that may have built up over time. An acid wash involves applying a diluted acid solution to the pool surface, which helps dissolve mineral deposits, algae, and other contaminants.

While backwashing filters is an essential maintenance practice, it primarily focuses on keeping the water circulation system functioning properly rather than addressing stains on the pool surface directly. Additionally, adjusting the pH level of the pool water to 8.0 might improve water clarity or kill some types of algae but is not a reliable method for stain removal. Therefore, draining and acid washing is the most effective and direct solution for tackling stains, making it the recommended option.