Absolutely!If it is like mine, a set of plain glass panes with a plastic "guide" that sits on the inside of the tank frame and the two panes of glass slide, I would go to a glass shop and get a new pane of glass. Ordinary window glass with the edges sanded works fine; take them the exact measurements of the pane. In 15 years I have broken I think 4 panes and this is how I've replaced each.
P.S. Sorry to take away business from Grant, but the money saved can then be spent on more fishies! Or something. B.