New pool owner here! We recently and purchased and had installed a Sharkline AGP, 24ftx48in. We upgraded to the millennium sand filter 26", 2hp 2spd. While at the poolstore today getting our start up chemicals (part of our package) I asked the employee how long I should run the filter and she told me to run it all the time. That seemed excessive to me.....? Growing up my parents had an inground pool and I don't remember the filter running 24/7.