That looks like a nice setup!
I read the thread title and said "oh no..." to myself. I was right
The easy way to see if it is tempered glass is to drill it. If it explodes like a car window, it was tempered...
Seems kinda silly to temper the sides of a 30g, but the evidence is there!
I hate cleaning up all those thousands of tiny pieces of glass, it's one of my least favorite things about replacing broken car windows.