You dont see God in a wet suit diving into every cave
HHHHmmm, wellll, not since the late 60's or early 70's anyway, ...and then there's that tricky TriMix I keep trying to work with in my tanks...
But, I do see the point. I have two Flame Scallops, and the information I have, is they won't last that long either. BUT... I would let them move where they want to, right from the beginning, and just leave em be... Both of mine, have wedged themselves in dark cave areas out back. They don't move...they just keep their beards in the wind and catch what they want.. (sort of a ZZ Top type thing...) I do feed a little filter food to the whole tank. They seem undisturbed and happy (as a clam) where they are, so I leave them alone...
I'll tell ya what happened to them next year... (but I don't lose sleep over it...)
Bill