Not sure if these are good or bad

[CoolLibs]

No clue what these little white worm looking things are and need help knowing if they are good or bad for the tank

 

[Cell]

Probably just copepods, a good thing, but hard to tell.

 

[5280Reef]

Google flatworms and see if there is a resemblance, but they look more like copepods although like said it's tough to tell in that picture.