As a point of reference, I'm using a 40 gal aquariumk as a sump in my 100 gal. As that's a DSB with skimmer system, I just sit the 40 gal tank below my 100 gal and place my EuroReef skimmer in it. I am, however, in the process of converting that system over to a refugium. Aside from the Nitrate-factory aspects of tricke filters, I woulkd also look out for their often limited capacity. As the previous poster said, beware of the tank suitability claims on the box. As Marketing professional, I never believe the crap they claim.
Hope this helps?