Where to drill the tank?

[Slandra]

Hello everyone!

I am going to make a hole in my 90 gallons tank (tempered glass) for the bulkhead.

What do you think is it the safest place to drill: in the bottom or in the upper side of the tank?

Thanks in advance for your kind collaboration.

Gianfranco

[harr3826]

dont drill tempered glass it will shatter