ID Moving Brown Specks?

[SaltyShel]

I have posted a few pics of my tank on here and I’ve gotten a pretty general consensus - it doesn’t look mature and I don’t seem to have enough algae for my pincushion urchin. So I’ve been leaving the white lights on for most of the day, only the blue at night. More algae started growing but suddenly this brown speck stuff is growing too!! If anyone knows, please tell me what this is. I’m very concerned.
I have a video but I don’t know if it will play. I’ll attach anyway! If you zoom up on the pics you can see the specks but they’re all moving!!!

 

[sixty_reefer]

Most probably copepods a mandarin would have a field day in there lol

 

[Uzidaisies]

yeah dem sum pods.