Some 55g tanks have tempered glass

[gomezladdams]

Building a sump system for my fishroom.Was drilling holes for bulkheads in the backs,got 1st done no prob 2nd the glass explodesBANG boy did that scare the crap out of me.Someone on this forum had told me how to tell the difference between plate and tempered,but now Im sure I can tell them apart.I got 2 more 55g s and 1 is tempered and the othe isnt.luckily it was my oldest most scratced up tank I broke.

 

[Nic]

i always have the backs of my tanks drilled this way it dont matter if the bottom is tempered sucks to have it explode on you but atleast it was the old one

 

[repair]

You have to watch ALL the glass on some of the 55s thay have started making all of the glass in some of the tanks out of tempered glass

 

[gomezladdams]

It was the back I was drilling say so in my first post