Potenetial Tempered Glass Disaster

[jslaney]

I bought a used 70 gal BF Drilled tank that has a sticker on the bottom that clearly states that it is made from tempered glass. The hole in the bottom looks more ground out then drilled.

I keep hearing that tempered tanks cannot be drilled but mine is. I was wondering if the tank is likely to have a catastrophic failure one day due to this?

Any advise would be great.

PS. As a newbie planning his first tank I love this site and really appreciate all help and info everyone gives.

Jon.