Substrate.....or no substrate?

[mark]

Originally Posted by sharky222

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?

My rocks directly on the glass and don't move.

If planning sand don't place the rocks directly on the sand as will settle and shift. What I did when I had a DSB was make platforms out of egg-crating and zip-ties so the bottom 3-4 inches of the rock wasn't buried.