The Ocean Clear filters are hard to beat. I have a couple of Model 354 poly bead filters. Love em. That Quite One 9000 looks impressive, but after looking at the specs., I'm not sure it's pressure rated, and would be good for canister use. I sent an email to Foster's & Smith, but they didn't seem to know either. A regular circulation pump works great for a sump return, but they are not worth crap as a canister pump where they need to pressurize a larger filter. I've tried it, didn't work. Barely had any return flow. I had to buy a different pump that had a pressure rating for canister/protein skimmer, etc. use. Does anyone know for sure? Del, anyone, what do the instructions say? Unkown, is your 6000 hooked up to your Ocean Clear's? I would like to know the pump's intended use before I buy one.