OMG!!! I just got1 made this size weeks ago!!
Yes i have the same problem with brace element of this size of tank..Iam still try to figure out how to brace it up down here..
bracing this tank is pretty head scratching, when i fill the thing right up the both top side and middle can handle it, but in between the middle and side its will bow..
my are made out of 10mm laminate glass,
right now my tank are only half filled, i am going to try to brace it up 2morrow with more glass..
Ryanjury is right to get it well brace you have to brace a glass right in the middle of the tank, but that would be the las option, i was going to put a brace in 3/4 of the tank, any 1 had any sugguestion guy?