Overhead Refugium

[Samw]

I plan to set up an overhead refugium so that I can run my system with reverse photoperiod in the refugium. The plan is to use reverse photoperiod to stablize my tank's DO and PH levels by having photosynthesis occuring 24/7. It is my hope that this will reduce the amount of Acropora and Montipora deaths in my system by keeping DO high around 80-120% (instead of 60-120%) and PH around 8.2-8.4 (instead of 7.7-8.4).

I don't have a lot of space to put the overhead refugium. I can fit a tank with a footprint of about 9"x12". Something like an Eclipse 6 would fit but I would prefer a true rectangular shaped tank. I would also prefer acrylic. Is there such a thing? Something tall would be nice too as I would like to get more volume of water in the refugium.

I've never set up a refugium so I wouldn't know how to plumb it. I guess I'll need a bulkhead and some pipes. Suggestions for articles on plumbing?