What is the main purpose of a pool skimmer?

The main purpose of a pool skimmer is to remove debris from the water surface. Skimmers are designed to capture leaves, insects, and other floating particles before they can sink to the bottom of the pool. By doing so, skimmers help maintain the cleanliness and clarity of the water, which is essential for a pleasant swimming experience. Keeping the water surface clear also contributes to overall water quality and can reduce the workload on the pool filtration system.

The other choices highlight actions that are not the primary function of a skimmer. While skimmers are part of the broader pool circulation system, they do not control water temperature, increase water acidity, or function primarily for water circulation. Instead, water circulation is typically managed by the pool pump, and heating is accomplished separately through heaters or solar covers. Adjusting acidity involves the use of chemicals, which is unrelated to the skimmer's functionality.