sealing a cracked pane?

Chris Palma wrote:

Based on the limited amount of free time that I have, this is my usual
solution -- if I can afford it, buy it since if it depends on me having
enough time to fix it, it might take months. Besides, this helps the LFS,
right?

I just hate to admit that around all the accomplished DIY'ers reading this
group.

So... anyone interested in a free 20 gallon aquarium with a small crack?
It's located in central Pennsylvania, USA.

Stick 'er out on the sidewalk with a "free to good home" sign on it. Still OK
for a reptile or small mammal cage.