Are they small, like a piece of human hair? I had one in my tank. They are plantira (sp). They usually show up because of over feeding. I will try to find the site I located. Give me a minute or two...I will also get the correct spelling of it.
Here is a site:
Aquarium FD - Planaria Small Hair like White Worms - Disease Identification, Diagnosis & Treatment
Hope this helps!
Here is a site:
Aquarium FD - Planaria Small Hair like White Worms - Disease Identification, Diagnosis & Treatment
Hope this helps!