Is this microfauna?

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Okay so, I had a sick fish with Ich and Lo the details will be on my bios thread but ehen I move my rock, on the glass, I see these white things of all different sizes staying still and jerking around. Are these microfauna like copepods or amp hopped and if I let these do there thing for six weeks with no photo (I have a 6 week lockdown) would these be suitable for a mandarin dragonet in a 40? The are all over the glass and I didn’t seee them yesterday

 

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Dam autocorrect