What are these?

[Kev651]

I have no clue what these are. They are on the rocks and on the glass. They are little white specks. I have been told little feather dusters are growing.

<a href="http://s1292.photobucket.com/user/Kev651/media/20140330_204823_zpse9c35f34.jpg.html" target="_blank"><img src="http://i1292.photobucket.com/albums/b575/Kev651/20140330_204823_zpse9c35f34.jpg" border="0" alt=" photo 20140330_204823_zpse9c35f34.jpg"/></a>

 

[clay12340]

They look like spirorbid worms to me. They're basically a tiny feather duster, but in my experience they stay tiny. I believe they are harmless aside from growing on every surface in the tank.

 

[Betta132]

I have some of those. They're basically uber-tiny feather dusters, yes. They can get a little annoying, growing all over stuff, but they won't hurt corals or anything.

 

[Kev651]

Awesome so now I don't have to worry about it now