I agree that glass on glass is a better repair method....just stay away from acrylic due to poor bonding.I would go to my local glass shop and get a piece that is 1/4 inch smaller than the base piece. 1/4 to 1/2 inch thick. Put some glue inside the tank and lay the sheet in place. Tool it and let it sit for a day.
It will be way stronger than a new tank. New tanks break too. It is just happens some times.
I am not the king of glass, but look at my build thread. You can see that I have had some experience with what works and what doesn't.
Good luck. Dont give up. If you live near me, I have time and can help you out.


