What factor primarily influences turnover time in pool circulation systems?

The factor that primarily influences turnover time in pool circulation systems is pool volume. Turnover time refers to the amount of time it takes for the entire volume of water in the pool to pass through the filtration and circulation system.

The larger the pool volume, the longer it will take for the water to be circulated and filtered. This is critical for maintaining water quality, as proper filtration helps to remove debris, contaminants, and ensure the chemical balance is maintained.

In contrast, factors such as water temperature, chemical balance, and pool shape can influence the efficiency of the filtration process, but they do not directly affect the calculation of turnover time. Water temperature can impact chemical reactions and debris decomposition rates, chemical balance is crucial for maintaining safe swimming conditions, and pool shape may affect circulation patterns but none of these factors are primary determinants of how quickly the volume of water is processed through the system.