You know, I asked what kind of rock I got today when I went back to the store and I can't remember what she told me. It was something I'd never heard of.
I actually changed the rockscaping b/c I wanted something more natural looking - inspired by a trip to Cozumel, I guess. I want it to look like the reefs we saw there. You cant see it from the pic but there are caves and such but you can only see them from the side views. I really liked how it looked before, but I'm hoping this will work better for me in the long run.
BTW, Those arent air pockets, I added live sand to my crushed coral and it just hadnt settled in yet. I know people hate crushed coral, but I dont like to dose calcium and it always kept my last tank's calcium really high w/o dosing.