Ok, we need to know your tank dimensions. A 90/G takes roughly 1 tube of silicone per panel.
500/g will take 2-3 per panel I'm guessing.
We're gonna need all the things mentioned above. Just let me know when you get things ready.
Ohh, I'm not a professional tank builder and can't be responsible if the tank fails later on.
I highly doubt it would completely break. If anything, it would give at a seam and start leaking.
None of the panels can sit on top of each other. They are all built around the bottom.
With the correct bracing & silicone, I'm confident we can do it and it will last long term.
Most tanks that fail are due to applications using the wrong/weak silicone, improper building (glass on glass), inadequate cure time or cleaning, or panels that have been moved.
I wouldn't build anything that large without using Momentive 100 series, or SCS1200.