<a href=showthread.php?s=&postid=13591172#post13591172 target=_blank>Originally posted</a> by IslandCrow
Nassarius snails would be my #1 recommendation. I'd also agree with staying away from sand sifting starfish for the reasons stated (though they eat fauna, not bacteria), but that's based on what I've heard from people much smarter than me. A couple other suggestions would be a Cerith snails, fighting conchs and sand sifting cucumbers. I've always had issues keeping conchs alive, but it may just be me. Those three really don't do a lot to stir up the sandbed as they stay on or near the surface, but they'll help keep it clean.