Too many Feather Dusters?

[Trevor Robertson]

Hello all..

Okay well my tank is doing really well and the GSP's that I got from Beverly are growing (I think that is so cool!!)

Any way my question is that I am getting several feather dusters growing on my live rock. I had a few (2 or 3) small heads and maybe 3 large heads when I got the rock but now I can see maybe 100 heads (I don't know if that is what they are called but you know the part that moves in and out of the worm cassing).

Is this normal?
Is is something to worry about?
Do you have to feed them?
If it is a problem what can I do about it?

Thanks for all your help.