Help with a glass aquarium internal overflow project

[snowbomb101]

I just bought a used 150g glass tank that doesn't have any means of overflow. My previous tank had an external overflow box using the siphon method and I did not care for it due to noise and losing siphon. I want to do an internal overflow either in one or both corners with a return in one of them or perhaps a center overflow? I have no problem drilling holes and /or custom making glass or plastic boxes, etc.... The tank and stand will be on the main floor and the sump will be in the basement. I have already installed 2-2" drain lines and 2-1/12" return lines (if 2 are needed). I can't seem to find any pre-made corner overflow systems.

Any help would be greatly appreciated!!!

 

[cmantis]

What about an internal weir with external overflow? More room on the inside.

 

[ygon]

Have you looked into one of the glass-holes kits? I am running there 3000 overflow kit on my 165 gal and love it. Comes with everything you need to install.