I bought a used 180 gallon Oceanic tank from a guy I work with and want to add an overflow box to it. I've had no luck in getting Oceanic to email me back so I thought I'd post some pics here hoping that someone might recognize the tank and know. I was originally wanting to drill the bottom but there's a good chance it's tempered. What do you think the chances are that the sides are tempered? I've seen some designs on this site that look nice coming out the back so I think I could be happy with that. Any help would be greatly appreciated.