Possible to drill my tank?

[axe_man16]

Hello everyone,

I have a 48 long x 13 wide x 21 high 55 or so gallons. I have read that all tanks this size are tempered glass and can not be drilled. I do not know the manufactuer of the tank but there is a sticker on the bottom that says "do not drill the tank enclosure".

If it is not possible to drill my tank, what are the best options for a hob overflow?

If it is possible to be drilled, where is the best place to take it in Edmonton?

Thanks