I did have a 35 gallon tank that i droped (becuase it was really wet) and there was a huge crack on the bottom. I would try an aquarium sealent or rubber cement (the kind for fish tanks) and put that over the crack. Let it sit for a day or two, then, fill it up with FW and see if it leaks. if it doent, I would think it would be ok. Just to make sure, put some snails in and see what happends. If they die, i would really recomend to get a new aquarium. If you have any questions on this, post back. Hope it works!
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I just have to get it! I can't wait!