Thanks all, I have never seen this species of Feather Duster, I have had beautiful Hawaiians in the past (4-6 inches), nothing this small.
what are these little guys called?
By the way, I only feed the tank once daily mix of flake, pellet, occasional brine...its devoured in less than 3 minutes. Not sure its over feeding.
So glad to hear its a sign of a healthy tank, 'cause the little dusters are going berzerk!