In the spring I bought a 55 gallon from someone that was already set-up. Since then I've had ups and down (most notably a complete crash

) but after reading here I perservered and now have a healthy looking Reef that is finally growing coraline algea, nothing is dying etc, etc. Thanks members of CanReef BTW.
Yesterday I came home from work to discouver that my wife had been to the local Fish Store and returned home with a 90 gallon tank/stand/canopy! Whoo-Hoo!!!

However I have an issue. It doesn't have an overflow - internal or external. Short of returning it and trying to avoid using an external overflow (again) is there anyway to get around this? The bottom is tempered so no drilling. Is it possible to make an enclosure inside and drill the wall of the tank?
Anyone have any suggestions?
Thanks
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110 gal reef, homemade 30 gallon sump, 2x T5 HO 20,000, 2x Purple, 2x T5 Atinics, 50 lbs live sand/coral, 200 lbs live rock, Vertex in-80 skimmer, Danner Magdrive 700 pump, 2 clown fish, 1 coral beauty, 1 yellow tang, 1 purple headed goby, 1 Flame Angel, several other corals (can't remember the names

plus a 55 gallon freshwater in the Kid's room