want to drill a 65 gallon tank

[sobe]

thanks guys I'll try it with a polarized sunglass.
Now Im starting to contemplate if I should drill or stick with my PVC pretzel overflow hmm If i Drill I have to buy diamond hole saw, I also have to cut glass to make an overflow and then silicon it.

[Doug]

Moved to the reef forum for more info.

[Fishman]

I just purchased a Perfecto Cornerbow (70 gallon) ... only the bottom was tempered ... I drilled the back with (2) 2.5" holes for drains and a 1.5" hole for a closed loop ... glass shops or aquarium shops will drill for $15$20/hole.