Bug ID and What To Do About It

[Harry Muscle]

About two weeks ago I started seeing little white worms in my sump. Here's what they look like crawling on a wooden support for my return pump:

They are at most 6mm long and 0.5mm wide. Anyone know what they are and if they are bad? Also what's the best way to get rid of them without killing any shrimp or snails in the tank serviced by this sump?

Thanks,
Harry

 

[coralbandit]

I guess they are planaria from picture ..
Check to see if that is a match.

 

[Autumnsky]

Likely.
Guide to Planaria and Hydra Elimination - Aquarium Advice