Feather Duster? Tube Worm?

[SaltwaterTeen]

Well, these two lil' guys appeared after I have been adding alkalinity to my tank for about 1 week, what are these two guys? Looks like either a feather duster or a tube worm.

 

[Edmonton Eskimo]

looks like little feather dusters

 

[Corty]

Very nice, looks like dusters to me.

 

[Sam]

I have tons of those on my LR. They are tiny feather dusters and fairly common on LR, at least the fiji ones. HTH