We plan to purchase a new above ground pool in the future. (Just have to make do with the Intex for now.) But I have read and re-read and etc., etc...Hydraulics 101 til I believe I will go cross-eyed. My question is this...if we are looking at getting a 24x54 pool, estimated to hold around 18,350 gallons, then will a 1 HP, 2 or variable speed pump be fine? Also, we would like to go cartridge or DE. With a SWG, maybe Aquatrol. What size filter should I be looking for? And would some of the combo pump/filters made by Pentair or Hayward work for the pool size we are looking at? And do I have to look at above ground filters only? Any help would be greatly appreciated since I am having a hard time figuring what I need.