Planted Tank Guru
Join Date: Jun 2004
Location: Baton Rouge, LA
My girlfriend made something out of a lead plant weight and some steel jewelry wire. She sticks the free end of the wire through a tubifex cube, then folds the end down and presses the end of the weight over it. The cube is then held by a loop of wire running through it, and floats a few inches over the substrate. The cories, loaches, and neon tetras enjoy attacking it from all angles, while the rest of the fish are hunting for flake at the top.
I'll try Robert's suggestion later today and see if it works as well.