I found some interesting pieces of driftwood lately. The first one is huge, takes up one half of the tank and two branches sit above the tank by 3 inches for the small branch and the longer one is 5 inches(about 30 lbs. and wide) The second is an old piece attached to slate(maybe 5lbs.) The third piece is long and about 8 inches wide(about 15lbs.) looks like log. I also have a couple of small to medium pieces too.I will take a rough picture of it. I am still working on the design of the tank. I am trying to create a balance of the actual habitat and enough territory breaks for the fish. Is this too much weight for the glass tank? The tank sits directly on concrete floor.