I am in the process of upgrading my 55 gallon, and bought a 92 g All Glass corner tank used on Craigslist for a really good price. However, when I got home, I found a tiny crack on the middle of the floor panel of the tank. Its only about half an inch long, and looks like it might have been hit by a rock during landscaping. The glass is tempered. Will the crack propagate causing the entire bottom to give out or is it okay to use? Is there anything I can do? I was thinking I might buy a square foot of sheet acrylic or glass to place on top of the crack before I add substrate to distribute pressure or protect it from further impact. I bought the entire setup for a really good deal and would hate to return it, even if I could. Ideas or suggestions? Thanks in advance!