I just bought a 14' X 48" intex metal frame pool which came with a 1,000/gph pump. I am wanting to upgrade the pump and add a SWCG as well. My questions are, should I go with the Intex 2,500/gph pump with cartridge filter or the Intex 12" Krystal Clear Sand Filter Pump combo? Intex website doesn't give specs on what the 12" can handle. Also, when you use the adapter kits to upsize the inlet and outlet, do you have to make the hole in the liner bigger? Any advice on which direction to go would be appreciated.