Drilling a tank.

[sphelps]

Originally Posted by BigA

Is there a way to find out if it uses tempered glass or not?

there are a few ways the two easiest ways are:
1) call manufacturer and ask
2) use two polarizing filters, place one on each side of the glass and look through them, turn the filters. If it's tempered you will see a kind of mesh pattern of lines, if it's not tempered it will be clear.