What is a common sign that an acid wash may be needed?

The need for an acid wash in a swimming pool is often indicated by staining on pool surfaces. These stains can be caused by a variety of factors, including minerals, metals, or organic materials that adhere to the pool's surfaces over time. An acid wash can effectively remove these stubborn stains by using a diluted acid solution that helps dissolve and lift these deposits away, restoring the pool’s appearance.

While cloudy water may suggest that there are issues with filtration or water chemistry, it does not directly indicate that the pool surfaces themselves are stained and require an acid wash. Similarly, algae growth typically points to water chemistry or sanitation issues rather than surface staining, and high chlorine levels often indicate that the water is being treated adequately but might not address surface issues directly. Therefore, staining on pool surfaces is a clear and specific indication that an acid wash may be necessary to maintain the aesthetics and cleanliness of the pool environment.