Thank you! I’m super excited to get it going after a few years with only small nanos.. You can drill the 40 breeder but they do say they may use tempered glass occasionally If that’s all that’s available, so I would test first.. supposedly the bottoms are never tempered according to their specification chart.
Tried drilling an Aqueon 4o Long a short while back. Anything above their 33 Long has tempered glass. Look at my build thread to see what happened. LOL
They have a separate line of "reef ready" aquariums.
I use them all the time. Sure; they may not be the prettiest, but they are sturdy.