Which of the following is NOT a function of pool filters?

Pool filters primarily serve to remove physical contaminants from the water, enhancing overall water clarity, and helping to circulate water through the pool system. By effectively trapping dirt and debris, they significantly contribute to maintaining a clean swimming environment. Furthermore, the circulation of water is crucial as it aids in evenly distributing chemicals and maintaining a balanced aquatic ecosystem.

However, enhancing chemical balance is not a direct function of the pool filter itself. While proper filtration supports the effectiveness of pool chemicals by ensuring they are evenly distributed throughout the water, the filter does not actively adjust or balance chemical levels. Instead, the responsibility for managing and adjusting chemical levels falls to the pool operator, who must regularly test and treat the water using various chemicals for sanitation and pH balance. This distinction clarifies why enhancing chemical balance does not fall within the primary functions of pool filters.