Identification and question

[GatorPharmD]

I have several of these, that I can see, in my tank. I think it is a fireworm.

Is one ever able to avoid having these worms in a tank? - Thank you in advance.

http://i966.photobucket.com/albums/ae145/gatorpharmd/IMG_0135.jpg?t=1311870978

[Sugar Magnolia]

It's a harmless bristleworm. They are beneficial detrivores.

[GatorPharmD]

Adrienne, thank you.