I need a school of tetras or barbs for my congo river tank. I currently have buffalo head cichlids as the only inhabitants of a 55 gallon. I also plan on adding some congo garras that I see the wet spot has right now. I've had congo tetras before, but I'm not sure if they are more from still water or places with alot of movement. I'm going to be adding alot more water movement once I find all of the fish. Any suggestions?