[ejwsr]

I need to cash a reality check here.

My understanding is that in an LS/LR system, the biological filtration occurs in the display tank where the greatest mass of the biofilter is. The purpose of a sump is to provide the mechanical filtration of suspended particulates through filter media and protein skimming, as well as chemical filtration if so desired.

Flow rate has the function of ensuring detritus doesn't settle on the substrate and corals, as well as duplicating the wave action for the reef zone you want to build.

Does it follow that given a 100 gallon tank with a desired total flow rate of 1500 gph that 750 gph sump flow and 750 gph tank flow would give you maximum filtration dwell time and target flow rate?