tempered glass

So can anyone confirm this before I throw away 1800 bucks.... I just talked to marineland and they told me that there is no tempered glass in a 300 deep dimension?? Not even the bottom which I found strange?? Has anyone had any experience with one of these with drilling the bottom?? I know it...

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...