wierd pest

[Steven1015]

I recently battled red flatworms in my system my sytem is a 120gal display tank conected toa 40 gal sump with a 40 gal anem tank and a 30 gal fug. For fish my 120 has a a pair of sixlines which were added to take care of flatworms didnt help though and a leopard wrasse. There are other fish but im jsut mentionioning possible worm eaters. In my 40 gal its just a bunch of clowns and a tang. and in my my fug i have a bunch of macro algae and a mantis shrimp. Well in my fug i started to notice what look like flatworms again but these ones dont seem invasive like the nasty reds were. Im seeing very few of them and there diffrent in color. I have not seem them in any other tank then my fug so i have started sucking them up but there is very few of them. yesterday i tried to flatworm exit the fug alone i used a mega dose of flatworm exit and it did nothing at all to these guys. Someone told me that they may be like a coral eating nudi. Im not to sure though what they are cause nothing in my system is suffering all. Any ideas or suggestions from anyone. I tried to get a pic but there to small for my lense on my camera.

 

[nanobuds]

probably a bristle worm. does it have white bristle looking hairs on it? if so, dont touch it. it will inject the very itchy bristles. that is why ur fish dont eat them. search up bristle worm.

 

[Elysia]

Are they a translucent cream color? Sort of shaped like a generic ghost?

 

[aromantis]

They are another, harmless kind of flatworm. I have the too. They don't reach plague numbers, and I believe they eat copepods. Another difference I've noticed is that the can swim, all the red ones I've seen just curl up in a ball and float until they reach a hard surface and then grab on.