Im not sure if you checked out the pictures in my post below of my flow thru tank system that I am keeping my Brookies in. At the start I was pumping just 1.5-2 gallons of straight well water into the system (700 gallon tank)and I didn't have as much of a swirl as I had wanted. I have tweaked the system a few times in the last 3 weeks and am now pumping 4-5gpm out of the tank via a jet pump and preasure tank up thru the degasser unit and back down into the tank inflow port. With the new almost 7gpm of inflow into the tank there is a very noticable swril and current in the tank and all the trout are facing the inlet and swimming constantly counter clockwise (flow in the tank is clockwise). The seem happy and healty but I would think that could be a bit much flow for your system as bass don't really need as much current.

Ryan