The tank is 120x36x36
it has a 200 gallon sump and a 180gallon refugium
the filter room is in the basement and that's what the picture is on the bottom. On the right you can see a piece of the two 200 gallon vats used for water changes and topping off.
Sean, that's a sweet setup bro. I agree with Jon, NEED MORE PIX.....UPDATED ONES.
Jon, I don't see any need to let newly mixed SW age a full week. If you've got a heater in there with some decent circulation you should be good to go after 24 - 48 hrs. I've done 25% w/c's with water 24 hrs old with no ill effects. If you want to err on the side of caution, you can go 48 hrs and that should be just fine.