QUOTE (Orin McMonigle @ Dec 29 2009, 12:16 AM)

Fruit certainly does seem to make a difference for some species.
I would not keep them in substrate that deep. Mine are in 2 inches of loose substrate (no soil) and somewhat dry, and are not fed as often as most others I have (mostly dead leaves and the occasional fresh veggie) and they seem to reproduce pretty well for me when temps are around 80 +/- 5 degrees.
Distrubing the environment can make a difference for some species it seems, but I "turn over" or "re-mix" the substrate in almost each bin almost each week....though I am due for the annual "sifting of the frass" and adding any lost substrate.....but have been putting that off just a little....