I have a small concern here. The water filter creates strong currents in the tank. It forces the fishes to keep paddling more forcefully than is normal or they get swayed with the current. Does it have any stress factor on the fishes. I had earlier placed the filter so that the current goes length wise in the tank. Now considering that it covered a larger area, I have placed it breadth wise. Now the current gets subdued when it hits the opposite wall of the tank. But still the fishes have to keep paddling a little harder than normal (of course that is what I feel ). Tank is 2 ft * 1 ft * 1.25 ft.