This is my 55gal it took me a few times to get it right, but I final have it where I want it. Very little of the rock touches the glass, it comes out from both corners and makes like a U. There is 40lbs of live rock and about another 40 to 50 pounds of reef bone.There is plenty of space for fish to hide behind the rock, and caves. The tank isnt that old, so Im sorry there isnt a lot to look at. Im just taking my time adding things to my tank to make sure things arent going to go crazy. Hope you like and it helps.