Advice for a newbie with a marine tank

[Martmanicus]

Yeah thanks Mark. That definitely helps. I think what I'll do is take out all the live rock and do as you say. Try to get the crabs and mantis out of there and then rebuild my structure. I'm glad that this happened now I guess before I get any fish in there.

I had setup my live rock on the glass and then put the sand in afterwards. I read that was the best way to do it to avoid pockets of trapped sand under live rocks. But now when I rebuild the rocks are just going to be ontop of the live sand. Is this a problem?