I ran my 42-gallon with about 50 lbs of LR
in it for about a year and a half, and I did not have any problems with just vacuuming the sand that was not covered with rock. I think that a tiger tail sea cucumber is likely the best sand sifter for getting between the rocks on the sand. When I had one, I never noticed any visible detritus buildup around the base of the rocks.
92-gallon corner tank, 100lbs of LR
, 140lbs of sand, 250watt 10,000K MH
, 110watts of actinic PCs, Mag 7 return, custom refugium, AquaC EV180 w/ Mag 5
Female lyretail anthias, eyelash blenny, tomato clown, saddleback clown, firefish goby, 2 sand-sifting stars