Thanks for all the replies. I guess it seems that most experince a little bending. The glass is standard thinkness, about 1/4 inch.
Malklore, the aquarium isn't an all-glass, its made by perfecto. This is why I brought it too attention, because I know if it was an all-glass, I probably would be overly concerned over nothing. The 1/4 inch sounds a lot worse than it seems; when looking at it, it isn't that terrible.
I guess I'm good for now. But of course, until it breaks is when I know I will need a new aquarium. :shock: