If it were a deep sand bed (> 4" deep), then I'd be concerned about disturbing the sand because H2S and other toxins may be released into the water column potentially causing harm to your fish and corals. Since, it's shallow, I wouldn't be concerned. A DSB should be greater than 4" and it's probably a good idea to do the transfer. If it's less than 4" deep, then you have to do the regular maintenance of vacuuming up the detritus.
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180 gal tank, 50 gal sump, PM RFCa6 Ca Reactor, SWC Extreme 250 1A Cone Skimmer, Tunz Osmolator ATOF, Aquacontroller Apex, Aquaillumination Sol Super Blue 6 x 75w Units, Acros/Softies/LPS/Mushrooms/Zoos, Purple/Powder Blue/Yellow Tang/3xBlue Chromis/2xTomato Clown/Lawnmower Blenny
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