Yes it is a remote DSB.
The RC thread says it all. In my case, instead of a bucket, I sectioned off a chamber in my sump 36"L x 5"W x 12"H fed by my skimmer return line and draining into my return pump chamber. I filled it with a coral based substrate.
Here's a pic during the building phase (The plastic plants were there to better highlight the refugium chamber).
The sump flow initially goes:
Display drain (black PVC pipe), Mechanical filtration (AC 500 Sponge), Skimmer chamber.
From there it goes either:
Skimmer returnline, R.D.S.B., return pump chamber
or:
skimmer chamber, Refugium chamber, baffles, return pump chamber.
Coderad, What size of display do you have and what does your sump look like? Is it a prefab model or just a tank? How you set up a sump depends somewhat on the space available and the livestock you intend to keep.
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BMW R1150RT