Update:
Here are a couple photos of the plumbing routed and test fitted. (The in-stand pics have a back background because I leaned a board against it for the photos - didn't want to hang that leopard blanket again
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It should give an idea of how things work:
The sexy-silver Iwaki is the sump return and the red Coralife is running my closed loop.
View from the back:
I just realized that I didn't have the other drain tube connected for this picture, sorry. The pipe on the left is my drain with ball valve (for Herbie method), the center pipe is connected to the closed loop bulkhead in the back wall of the display, and on the right (not pictured) will be my emergency drain pipe.
Cheers,
- Chad