I have the same problem. I can be neutral, but if I'm not moving forward, my feet float. I am diving in fresh water w/ 7mm wetsuit, 7mm boots and atomic split fins. I have a back-inflation BC that is weight integrated. I dive with a total of 26 lbs of weight, 22 in the dumpable pockets and 2 ea. in the non-dumpable. I'm a new diver and this is really irritating me. Oh, I also have an E7-80 that I have mounted as low as possible on the BC. On my next dives this weekend I will try moving the weights from the non-dumpable to the dumpable pockets. If that doesn't work, other than ankle weights or a belt, any other ideas? I'm even considering new booties / fins.
-Aaron