Little white spirals??

I have had a small explosion of little white spirals (for lasck of a better term) The have attached themselves to the glass and rock of my tank and are quite hard to scrape off (but can be done) The look to have a very small sifter(like a feather duster on the end) Does anyone know what these are and should i be removing them??(i think i should) I can see that they cam from a cluster on one of my live rocks. Any help will be appriciated

 

hard to say without pic, but I'd guess scypha sponge. which is harmless filter feeder.

 

They are micro dusters and are harmless. They are a sign of good water quality.

 

yup, +1 on beneficial mini duster

 

Sweet thanks guys.

 

I have a lot of those too, Spirorbis(?). Harmless little filter feeders, that can get a bit annoying.

 

Are you using any liquid feeding supplements?
If you are, just cut down on the planktonic feedings and their number would begin to decrease.