ok, I've noticed that the all around answer to this topic hasn't been answered, atleast not that I have seen . Does a "Duel" Filter system work or not? I.E. A Pool->Sand->Cartridge->Pool set up with a bypass between the Sand and Cartridge connection so its Pool->Sand->Pool. Right now I have a Cyclone 200 Cartrage with a 1.5 HP Dual Speed Pump (and to me, its a *****). I have been thinking about getting a BaquaPure 2600 Sand Filter System and start using Baquacil.