Learn from your mistakes.
Information isn't given here without some experiance.
START AGAIN.
I just lost a tank I had for years.
Finally gave up under the strain.
1.2x.600x.600, thickness of glass, 6mm.
The fault of too thin glass, was the front exploding, not just cracking.
Glad I wasn't there.
Result, a complete empting of tank in record time.
Complete loss of all fish.
A big clean-up job.
Contemplating using the remains as a pladorium, (is that what it's called?)
Shallow water with emmersed plants in higher part of the remains of the tank.
Alan