I'm going to have 20 gallon display tank that is BB. 6x24 HO T5 SPS reef with a Remora Pro skimmer and 1000 gph flow. I was thinking of running a HOB 2.5 gallon fuge almost completely filled sand with a small pump hooked up to it to run a small amount of water over the top of the sand. I figure it will add some natural benefits to the reef while still having all the BB benefits (very high flow, nutrients suspended, etc.). Would a remote sand bed contradict everything a BB does? Does anyone have any comments about this idea?