Substrate.....or no substrate?

[sharky222]

Thanks, everyone, for your feedback....still haven't decided what to do, but I am less confused by all the options!

I am gathering from various posts that one reason to have sand is to keep the aquascaping secure. However, I have read that the rocks should go on BB rather than sand, since pockets can form between the two if the rock is place right on top of the sand. True? If I go BB, how do I keep my rocks from shifting?

Anyway, still debating....I like the thought of having sand-burrowing critters, so it will probably come down to that.