I have the pool setup listed in my signature and it was bought at one of the " Rec Warehouse" places a few years ago before they went belly up. I have never from day one been convinced that the "hang on the side cartridge filter" was adequate, my research on it led me to believe it was a spa filter, but I've soldiered along for a few years now, ordering filters and replacing them when needed and rinsing them daily. There is no timer and the pump runs 24/7 in the summer. Wouldn't even an Intex sand filter be a better option? I think it would but the trouble is we just ordered cartridges that are on the way and she says we will have wasted the money on them. Or am I the one that's all wrong here? Would not be the first time!