should i be worried about this kind of flatworm

[this is me]

I got alot of them in the main tank and the sump.
harmful?

 

[Keith Sheridan]

I wouldn't worry about that kind. The species that has everyone panties in a knot is a reddish color. Also, the only thing harmful about them is their apperance when they reach plauge proportions and I guess if you kill a bunch off at once, the nutrient spike.

You should be just fine.

 

[NateHanson]

I've got them too, and they seem to have maxed out at a few dozen. No real problems.

 

[JustDavidP]

The clear flatworms tend to stay in sumps, fuges, and other low lit areas. They also tend to keep low in population size. They are amazing swimmers! Neat to watch. I've had some that flouresed! I've not seen them in months, probably didn't survive, but it was freaky none the less. My sump looked like it was filled with fireflies one night!