Drilling 75g marineland tank

[Super payso2]

Hi guys hope you guys can help me out. I want to drill my 75g marineland tank. The bottom is tempered glass my question is does the back of the tank is also tempered glass or can I still it?

Also I have a hole saw for the glass I used it before like 8 times. Do I need to buy another one or can I used the same one?

Thanks in advance.

 

[GugsJr]

The back shouldn't be tempered. If you have polorazied glasses you can tell though. As far as the drill bit you have to look at it to figure that out.
[MENTION=2397]r33fswagg3r[/MENTION]

 

[r33fswagg3r]

Only the bottom is tempered on the 75 gallon Marineland tanks. As far as the bit, I would say it’s time for a new one.