Believe it or not someone on RC actually put their shrooms in a blender and let it rip. I'm sure you could find the thread using a search. From what I read it wasn't much of a success.
Buzz, that's a good idea on putting a heater in the skilter. I am sumpless and with no fuge on my 50 and would like to hide a few things (hang on). How even is the temp, I have my heater next to a MaxiJet and don't have any fluctuations(sp?)
How is water clarity, (cloudiness) with no sump? I don't have a sump on my 29. I have a DSB, about 35lb LR and light fish load, 2 small percs, a few LPS corals and the water is crystal clear.
I agree with Tremelle, play with the powerheads. I found if you lower the powerheads closer to the bottom and have them directed to the surface it doesn't blow the sand around as much.
I have a tomato clown that does this too. I have a niger trigger in a different tank that likes to rearrange stuff so maybe they have something in common.