I thought this was kinda interesting, a friend came over today, I wanted to show him the flow patterns, so I tried something new, I put a bit of flake in there, 2 hours later there was still flake moving around in the current, since it was not at the surface it didn't go out the overflow, every other tank 've ever had, the food would settle to the bottom within 5 minutes, I'll be able to use a lot less food, less nitrate and phosphates going into the tank, way cool. Tommorow I'll try a little frozen planton and see how that behaves...