a forty gallon breeder with skimmer in one end and egg Crete light diffuser on the other? you need flow and good lighting in your frag tank, but the flow dos not need to be aggressive while the frags are healing, I used a ten gal tank with a hang on the back skimmer for years as a frag tank
the BRS kit was basicly a hydroponics table with light rails for mounting a T5 hydro lighting system, they added a few pieces for plumbing so you could drain into a sump and return back to the upper table (tank)...
+1 for AA, Link--->http://advancedacrylics.com/collections/frag-tanks-1
I just used a 40g breeder. $40 for the tank at petco's dollar a gallon sale.
And I built my own rack using black egg crate and 1/2" clear acrylic bar.
It's plumbed into the rest of my system.