Safety concerns. Always marinate meat and fish in the refrigerator. You can use some of the marinade for basting after removing the meat or fish from it only if you bring the marinade to a boil and cook for five minutes to kill any bacteria.
Running the pump at night should only be when you are doing a major chemical treatment such as algae clean-up. Your pool is more vulnerable during the day, plants don't grow at night the way they do during the day--that's true of ALL plants including Algae.
Question is on how long should a commercial pool run for cond of 24 units . People use the pool every day there is sun .the bulk of People are in and out of the pool from 10am to 6:00 pm . I would say a average is 10 people in and out multipal time daily . Mostly sunning and they use the pool to cool off .