Despite a rather large GPH of flow in my tank, I still have a major problem with fish poop settling on the bottom. I think that it may be due in part to the fact that the tank is 30" tall. Anyways, I am thinking of adding a couple of nanostreams to solve this problem. How should they be positioned to keep things from settling to the bottom? Should I put them high in the tank, and point them down to the bottom? Should I put them near the bottom parallel to it? Or could I put them near the middle, pointed directly at the side, so that the water reflects off the glass and spreads out in all directions?