External overflow through a bulkhead?

[Myka]

Jostafew, I'm modifying an existing tank, and it is not a standard shape. It's the Zoa reef in my signature. I removed the AIO-type overflow/filter box I installed in there awhile back. The tank has such a tiny footprint that aquascaping is difficult enough without sacrificing for an overflow box.

e46er, if I did the elbows I would paint them, but the paint never lasts.