I am going to plumb the overflows both into a tee with a ball valve below it to control flow. That will come down into the fuge. I plan on having a piece of pvc
that is capped, with slots cut into it running the width of the tank on that side of the fuge. The refuge will take up 3/4 of the tank, the remaining fourth will be separated by a bubble trap with the skimmer in the first section and the return pump in the last.
Using this design my refuge should end up being approximately 40 gallons, plenty of room for a nice DSB
and chaeto. Using this refuge I hope to eventually have enough pods
to support a mandarin. I figure between that and 300lbs of rock, I shouldn't have any issues with a dragonet.