Why is maintaining a proper pH level crucial in pool management?

Maintaining a proper pH level is crucial in pool management primarily because it directly affects the efficiency of chlorine, which is the primary disinfectant used in pools. Chlorine functions optimally within a specific pH range, typically between 7.2 and 7.8. When the pH is too high or too low, the effectiveness of chlorine decreases significantly.

If the pH is too high, chlorine becomes less effective at sanitizing the water, leaving it more susceptible to bacteria and algae growth, which can compromise water quality and safety. Conversely, if the pH is too low, it can lead to rapid chlorine loss through volatilization, making it difficult to maintain adequate sanitation levels.

While other factors such as temperature and nutrient levels influence algae growth, and pool size is a structural factor rather than a chemical one, the critical relationship between pH and chlorine efficacy underscores why managing pH is essential for keeping the pool safe and clean.