How do you calculate the actual turnover time?

To calculate the actual turnover time for a pool, you need to understand the relationship between the pool's volume and the flow rate of water being circulated. The turnover time is the amount of time it takes for the entire volume of the pool to be circulated through the filtration system once.

The correct approach to determine turnover time involves taking the total volume of the pool and dividing it by the flow rate. The flow rate, usually expressed in gallons per minute (GPM), indicates how much water is being moved through the system each minute. Since turnover time is expressed in minutes, it's critical to adjust the flow rate to a per-minute basis to match the units.

By dividing the pool volume by the flow rate multiplied by 60, you convert the flow rate into gallons per hour, maintaining consistency in units with the pool volume, which is often expressed in gallons. This method allows you to effectively calculate the time it will take to circulate the entire volume of the pool.

The other choices do not yield the correct turnover time calculation. For instance, multiplying pool volume by flow rate does not provide a measure of time, while subtracting flow rate from pool volume is not a relevant operation in this context.