You can easily say that the volume of water in the bath must circulate through the pump once a day. So it depends on the flow of your pump (number of liters per hour) and the number of liters of water in your pool. Overall, the pump must run for 3 to 4 hours a day.
Note: You can extend this daily duration by 2 hours in extreme weather conditions or with frequent use of the swimming pool.
PLEASE NOTE: we recommend that you never run the pump for more than 8 hours a day!