Hi the tfp friends!! Do any of you who have an ultra frame or larger frame pool use the cartridge pump with the inwall skimmer that comes with it? Or has everyone upgrade to a pump and sand or de filter? Wondering if we can get away with using the cartridge filter for this year as we have a lot of work and cost cut out for us with the pool as it is without re doing the pool plumbing as well. But if it means the pool will be better off then we will do it!