White Worms

[krowland]

Just having finished my weekly water change, I noticed some very very small white worms swimming at the surface of my tank. There were about 6-8 of them. What are they and do I need to do something about them?

[gcvt]

Sounds like you may have some flatworms. Do you see them on the glass or in the gravel as well? Here's some good info on flatworms: http://www.skepticalaquarist.com/hydra.html