this probably sounds really dumb,(please don't laugh too hard!) but how do you get feather dusters? do they have to be bought? or do they just show up on your rock?
both too....since i lived in the carribean i went to the ocean you can see them on the live rock....but in your case is better to buy them in a full size....youll enjoy as i do to have a few on your tank i have 10 of them...