A quick question regarding the care of a featherduster. I thought that I was somewhat informed regarding their care but when presented with this new gift item that's neutrally buoyant I faced another dilemma. Because of his weightlessness - is a portion of his tube buried in the substrate or left exposed? Does it depend upon the other inhabitants? Or is the majority os his body buried? When viewed at a LFS, their substrate is thin and these guys(or girls) are all lying about on the surface. Please help as I can't find any written material on the matter. Thanks.