125 g tank

[splnissan]

how can i tell if i can drill my 125g tank or not want to do a over flow system on the bottom it says tempered

 

[KathyC]

I'll assume you already know that tempered glass cannot be drilled

Another assumption - you want to drill the rear 'wall' of it. What kind of tank is it? If you a=re not 100% sure - please post a pic of it.

 

[splnissan]

tank

im planing on drilling the back but not sure the it has a black rim on top ill try to post pics theres no name on the tank