There are a bunch of people in this thread that didn't bother to read the text. He says specifically that he's cutting 3 pieces of glass to use for bracing to keep it from bowing.
Just mounting glass for bracing doesn't just make it "structurally sound".
Thus my first comment in the first reply:
Did you do some homework on this before you did it? Never heard of anyone derimming a tank this size before.
Good luck, I hope its a successful project.
The short term is not the real problem, I think its the long term survival that may be the issue. Interesting to see someone experiment.