Here is the plumbing that I worked on a bit. It's going to have to be trimmed once it's installed, but it's a start. Everything that will be out of the water is painted for walking my wife through any problems that arise when I'm not home, but anything that comes in contact with water will be unpainted.
The red is the drain line, the green is the return line, and the yellow is the A.T.O.. The tee off of the pump return is to throttle down the return flow if necessary without adding too much resistance on the pump. The yellow fitting on that same tee allows the coil of flexible tubing to screw in for draining during water changes. The 1/2" PVC that comes off of the return line will go into a portion of the sump seperated by a baffle to create flow for frags.
I'm still contemplating using a closed loop, but I've read so many mixed reviews about them that I'm not sure. It sounds like they get clogged up with detritus and can be a real PITA when they fail. If I use one, it will be a siphon off the DT instead of drilling the bottom of the tank, but I'm probably just going to use my Koralias. I'm thinking about chiseling out some liverock to conceal them a bit (like the tunze rock), but I just don't want it to be a nigthmare to swap them out if they fail. Any thoughts?
I used the aluminum framing parts for a screen window to make covers for the tank. I ordered some mesh netting the hold in with the screen spline. It's made of translucent nylon and the holes are slightly larger than eggcrate. It should be dense enough to prevent any jumpers, but open enough that it won't hinder lighting. Here's some pics:
And fitted on the tank...