Question about setting up reef

[Aquattro]

If you're going to use sand, put it in first. During the cycling of the rock, lots of the critters will leave the rock and move into the sand. Stability isn't an issue, just seat the rock well on the sand and it will be fine. Any detritus that does fall on the sand will disappear soon enough, and will help establish the sand bed.

[digital-audiophile]

I have always went sand then rock, but I make sure that the base structure of the reef is pushed well into the sand so it is touching the glass.

Personally I love sand beds, to me BB makes a tank look too much like a fish store sales tank. In the end to each their own though eh?