Sure. I would suggest at least two of them however, so that you can achieve a more random, chaotic flow. FWIW - I use 4 of the larger ones in my 120m spread across the back of the tank pointed upwards to agitate the surface and angle across the tank. Depending on what you plan on keeping, I think you'll be just fine with them, although you might also consider the newer model with the magnet/cup on the back - it allows for much easier positioning and they can be removed without moving their magnets.