Just a note....it looks like the beer bong is to fill the tupperware jug...probably with RO/DI so he has some sitting right there for some kind of auto top off, or possibly so he only has to lug a bucket of water to it once every other week instead of every time he wants to top off.
as for the wiring, it looks like he used each "outlet" as a circuit onto itself....the yellow plugs have power coming from the outlet, which gives power to the lower outlet on the circuit with the GFI on that particular circuit.
I'm still reading the whole thread, but I'm gonna have to quote "Lurr" from futurama here and go with "This tank setup confuses and infuriates us!"
Anyone figured out what prompted him to use 3 drilled tanks for the sumps and refugium, but a hanging overflow for the display?