Vast majority of bristle worms are harmless to the system and are effective CuC and generally nothing to worry about unless you inadvertently grab or brush one.
My tank is loaded with them I am not a fan of them just because I find them ugly repulsive creatures.
If they are greyish and flat looking or grey with a red tip they are harmless to your system
__________________
 My aquarium is nothing but a smorgasbord for my cats.....
|