Originally Posted by Deep Seven
How thick the glass is depends somewhat on whether or not it's tempered glass. Is there any warnings on the bottom or anywhere saying not to drill it?
If you could post a picture someone might recognize it and tell you which it is.
No there aren't any stickers. The tank was given to me and if there were any stickers, he removed them for some reason. However, I have found many 20 gallon long tanks and all of them state that the bottom panel is not tempered. I will post a pic tomorrow if it is necessary however it's your typical rectangular tank. It measures 30 inches long, 13 inches tall and 12 inches wide. Nothing about it would be defining IMO