BUG IDENTIFICATION: white dots darting around

[sr20det]

Hey, my other tank suffered Nematodes, my other nano, today during water change noticed little white dots darting around tank on glass. Really fast buggers. Anyone know what they are, are they a worry?

 

[sr20det]

Ok searching around it looks most like copepods. Rasbora seem to ignore them. Hmmm, maybe another job for my guppy fry.

 

[Gill]

rasboras should take them once noticed, I find that shrimp will pick them off and eat them when they want to.

 

[sr20det]

Introduced willow moss recently, wonder if it has come in with them, otherwise not a clue on how they got in. Same with Nematodes in my other tank. Plants seem to be the only assumption.