[smokinreefer]

You're running 2 DC12000s in tandem? supplying 2 different return lines?

If quiet enough, maybe I can run one of these under the tank on a closed loop, as well as another for the return from remote sump.

The one under the tank would have to be as close to silent as possible, as the display will be a room divider between the family room and formal dining room.

I am also wanting to keep visible powerheads &/or plumbing in the tank to a bare minimum.

maybe a closed loop and a gyre or 2?