Hey, thanks for all the comments. 
Yeah, side overflows both drain down to the right end of the sump.
The sump has various algaes growing in it along with some xenia and other fast growing things mainly for filtration. There are some power compacts over it. The chambers are seperated by eggcrate to keep the algaes in place. I still need to get the crushed coral from my old tank and put it in the sump. I'm shooting for about 3.5 inches of it. The main display has sugar fine sand.
Water top off is in the last chamber of the sump. At the left end of the sump are three bulkheads. Two are for return pumps. Returns run through the overflows and over the top of the tank and into four 1 inch elbows that run continuously. The third bulkhead serves an external Aqua C skimmer.
In the right end of the main display there are four drilled holes for 1 in. bulkheads. These are intakes for a closed loop. They feed a Sequence Dart that returns water to the tank through a Oceans Motions Four Way valve. Each port on the valve serves two 1 in. elbows over the top of the tank. In the picture you can see 12 elbows in the top of the water. My wife hates these. She thinks they look ugly. But I have no power heads.
Behind the tank are a couple of large mirrors so when you look at the tank from the front you see the back of the tank twice over the rock pile. When you walk behind the tank you see the tank four times like you walked into a tunnel. If anybody wants to come by and check it out, pm me.
Jack
Big whorls have little whorls, Which feed on their velocity;
And little whorls have lesser whorls, And so on to viscosity
Lewis Richardson in 1922
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