It depends on what you are wanting to keep. For fancy goldfish and such, no. If you are wanting to do a river biotope with fish from fast moving water it would work. In either case it would be overkill. If you go with a canister I would reccomend a Marineland Magnum, I've always had great luck with them. Get it with the double valves and you can tone it down some. If you do this though only turn down the valve on the return side, not the intake.