You very likely could run less time, but each pool is different. I have a slightly bigger pool than you, and a smaller pump, and most of the time I get by with 6 hours a day, 3 in the morning, 3 in the late afternoon, all on low. That helps me skim off all the pollen. In June, when the cottonwood trees are giving off their cotton, 24 hours is not really enough time, but then I would have to empty the skimmer several times a day, so I keep with 6 hours and also do some manual skimming. From July onward, I could get by with 4 hours or less, all on low. If you have lots of plants that are shedding leaves and other stuff or a lot of dust blowing, you might need more.