should i drill!??!?!?

[TANK0789]

bottom of tank sticker says tempered glass do not drill. should i drill the back of it for my overflow anyways?

 

[Almon]

That probaly means that only the bottom is tempered. I have heard you can use Polarized sunglasses to the difference.

 

[Roy G. Biv]

If you look at a cars rear window you will see a checkerboard pattern with polarized glasses. If you look at a tank and see that pattern then its tempered.

 

[reefergeorge]

Drill it