IDK about the literature. The FB filters can be separate from the solids removal system entirely. Any solids light enough to be drawn in by the fairly low flow/suction will flush right through as they are for bio-reaction only, not filtration.
In my big tank, the FB filter was fed bypassed return water that had first been run through 3 Magnum 60 canister filters set up in parallel, then run through the UV sterilizer.
Below, are some pics of the setup being used for show and planted. In the first pic, you can see the 3 filters and the UV Sterilizer in the back (on the wall). the second has the sand filter hanging off the back of the tank in the background of the pic. The garden hose fitting and valve were for restarting the FB filter after a power outage or when stopping flow (the one drawback to FB filters, restarts are a real pita!). Third pic was again, common fish density in the 150G aquarium. Fourth was when I had a few fingerlings of several species (CC, LMB, SMB, BC, BT, BG, HBG, RES, WE, YP, GS, FHM)
