What could this be on the aquarium glass?

[Alex2002]

Hi guys,

A sew days ago I noticed that tiny black bugs (only visible up close) started to appear on the stones, the glass and the sand. I couldn't take a picture of them because they are so tiny, verity visible to the naked eye.
My question is, can they be harmful to the tank?

 

[I never finish anythi]

Hi guys,

A sew days ago I noticed that tiny black bugs (only visible up close) started to appear on the stones, the glass and the sand. I couldn't take a picture of them because they are so tiny, verity visible to the naked eye.
My question is, can they be harmful to the tank?

More than likely copepods.

 

[Lemons]

+ on copepods

And not harmfull. Essentially a reefers best friend and a good indicator that your reef is healthy and on track.

Some species even eat pest algae!

 

[Alex2002]

I tried to take a picture. You still say they are copepods?