yep i agree with the rest that they should pose no threat. i've got em and they've never bothered anything in my tanks.
I read that as well when I first started in the hobby. The book I used was referring to bristleworms. However, that is the same book that says you can't breed cardinals!!!!One question though, I read that some type of worm can take advantage of a firefish when it is sleeping, because it remains still and defenseless, and it just gets gobbled up. Do I have to worry about this? Just making sure its not bristle worms.