What is the primary function of a skimmer in a swimming pool?

The primary function of a skimmer in a swimming pool is to remove debris from the water surface. Skimmers are designed to capture leaves, dirt, bugs, and other floating materials before they sink to the bottom of the pool. This function is crucial for maintaining water clarity and hygiene, as it helps prevent organic matter from decomposing and affecting water quality. By collecting debris at the surface, skimmers help reduce the workload on the pool's filtration system and ensure that the water remains clean and inviting for swimmers.

In contrast, maintaining water temperature does not fall under the skimmer's responsibility; instead, this function is typically managed by heaters or solar covers. Circulating water is primarily the role of pumps, which move water through the filtration system and ensure even distribution of chemicals. Additionally, while some systems may have automated components that add chemicals, this task is distinctly separate from the mechanical operation of a skimmer. Thus, the correct representation of a skimmer's primary function is its role in removing debris from the water surface.