What is an indicator of proper filtration in a public pool?

Clear and sparkling water is a key indicator of proper filtration in a public pool. Effective filtration systems are designed to remove impurities, debris, and microorganisms from the water, ensuring that the water remains safe and appealing for swimmers. When a pool's filtration system operates correctly, it continuously circulates and cleans the water, leading to clarity and a visually inviting appearance.

Conversely, consistent water temperature, while important for swimmer comfort, does not directly reflect the filtration process or the cleanliness of the water. Regular water changes are beneficial for maintaining water quality, but they are not an immediate measure of the efficiency of the filtration system. Filtered debris settling on the bottom could indicate that the filter is operational but also suggests that the filtration process is not adequately removing small particles or that the system might need better maintenance. Clear and sparkling water, therefore, serves as the most direct and visible sign that the filtration system is functioning as it should, effectively keeping the pool water clean and safe for public use.