Thanks OFL & Drew, it looks like it was made without bracing.
When I went to the store to get a new heater and stuff for the tank I noticed that the new 50 gallon tanks had braces, I had thought nothing of it until that point.
So I asked at the store if my tank would be ok and the guy there said it was 50/50 he'd heard good and bad stories.
I then called another store and asked the same thing and got pretty much the same response but the lady there said since it was a 50 and was shorter and wider then say a 55 it was less likely to bust a seam.
The guy I got it from used it to house a snake. I filled it and let it sit for a few hours and there were no leaks, but I feel more comfortable getting opinions from people here.
I think I'll go ahead and use it. The albino has the opposite personality of Chopper, he has never sulked yet, and he eats like a horse! Which is the main reason I wanted to get going on upgrading his tank, sometimes I think I can see him growing right in front of my eyes
Thanks for the help!
-Az