Putting A Hole In A 90 Tall

[jsshark1]

Hi

I am adding a 90 tall (48"x18"x30") to my salt water system , but the tank has no over flow box. :(

I would like to drill a couple of hole around the top of the back glass.

is this tank ok to drill?? or are the chances good I will brake the tank and it would be better to just use a over flow box

is their a thread out their that some one has already drilled this size tank? if not a good thread on drilling tanks would be also good

thanks

[illal]

the size of the tank doesnt have much to do with it but if you check with the manufactor theyll know for sure... btw theres usually a sticker somewhere on the bottom of the tank that says wether or not its tempered ;)