Little white worms?

Lately I've been seeing little white worms on the glass of my two month old tank. There are hundreds of them about 1-2mm long. They move relatively fast. At first, I thought it was some kind of algae growing on the glass but noticed they move. At closer inspection, they are like little centipedes with a forked tail. I don't think I can get a picture of them, they are tiny. Are these good, bad, common and just part of start up of a new tank? Thanks!

 

Sounds like copepods or amphipods. Google them and look at the pics to see if that is what you have.

 

Here are two (this is an extreme close-up):

 

Flatworms?

 

Those looks like the beginings of a flatworm problem to me. They are normally brown/tan in color but these may be still too young. Look up how to remove a flatworm problem in google... what I did when I had a flatworm problem was cut way back on my feedings and they killed themselves out. There are medications you can get to get rid of them.