Aquarium drilling

[moocow]

I have an oceanic 58 gallon tank.
It did NOT come predrilled.

Someone here mentioned that the bottom is probably tempered.
Are the sides as well? How would I know? Or are aquarium Bottoms the only tempered glass in aquariums???

[jtma508]

I have a 90gal BowFront that I just got. The bottom is tempered glass (you should have a label saying that on your tank bottom) and, at least in my case, the front is also tempered. Im not sure if a non BowFront is also tempered in the front but it;s a moot point anyway. The back and sides are not tempered. I got that from Oceanic tech support.

[IPT]

There is way to tell using polarizing filters from a camera or polarized lenses from sunglasses - or call the manufacturer.

[moocow]

i believe I owe Oceanic tech support a call or e-mail then.
Thanks guys.