That statement makes me think of the cheese ad.
It takes time, for a tank to break, but one day, it will, and with tragic results.
Not only to the furniure, but to the inhabitants in the tank.
But have you thought of what happens when the tank finally goes??
Glass shards absolutely can go flying, anyone in the way could potentially gets sliced up. Think of an inquisitive baby, tapping at a fish in the tank possibly with it's bottle.
I had a tank 1.2 x .5 x .5, 6mm thick, braced both ends and centre.
Went out to the fish room one morning, years after it was made, to find my prized 125mm silver dollar school all over the floor of the fishroom, the floor was flushed clean with a sediment of gravel now coating it, and the tank shattered, top to bottom front pane.
There were large dangerous shards of glass pieces scattered about.
The only good thing was that I wasn't near it when it went.
I swore I'd never go above 450mm for another 1.2er, and then I'd use the Euro bracing.
You were lucky this time Rogan, you may not be next time.
If you have used the cross bracing as it was before, I'd suggest that you put a 50mm piece under each side of the centre brace, on it's flat, and up against the outside glass, this will double the area of glue holding it.
Also, the centre brace can easily be broken with something dropped on it; to help prevent this, a piece of glass, 50mm wide glued underneath the brace, on edge, front to back, will act as a strong back for it.
The reasoning behind both these, is that if the joint or brace fail while the tank is full, then a huge sudden stress hits the glass, and it will probably fail at a 45o angle from one of the remaining braces.
Alan 104