I finished hooking up everything on my UltimaII 2000 today and turned it on and found out I had the handle set for backwash. 15 gallons of water on the floor and many choice words later, I set the handle to filter and tried again. It seems to be working well with my Baracuda pump but it sure puts out a lot of water for the return! I am using a 1" hose barb elbow as a return jet and the water stream was shooting three feet long across the surface of the water. It was creating turbulence like a jacuzi! I lowered the return nozzle to about the middle of the tank and it works well now. The tank is 6' x 3' x 2'h and the amount of flow in the tank seems good (about 10x turnover) with no turbulance, just gentle waves. I think the filter will work out fine for me as my primary filter.