starr,
the rock comes just about to the glass, just lets me get the floating magnet (cant remenber the brand name, but I think I got it from Marine depot.com) by it. I have to clean it every two - 3 days.
Thanks on the rock work, I have a little problem with one side right now, rocks keep on moving on me. Have to get in there and re stack one of these days. I got some nice pieces (the shelf pieces) that give the valley a nice look. (I got lucky on them, my wife picked them out. I would have passed on them. As you can see, they turnd out great)