Is this Plankton or what are those animals?

[LeoE]

Hello guys I'm once again asking for your help. I have this small creature all over my tank (glass and probably all over my scape). Can anyone tell me what they are? They are literally millions!

 

[Saltyreef]

Pods.
These would be good isopods.

 

[LeoE]

Pods.
These would be good isopods.

What are they good for?

 

[Brandon3152134]

They are the building block of any healthy reef aquarium

 

[Saltyreef]

What are they good for?

Your reef

 

[LeoE]

They are the building block of any healthy reef aquarium

Ok great than I thought it is something harmful because my two clowns just died a week ago and I still don't know how

 

[Saltyreef]

Ok great than I thought it is something harmful because my two clowns just died a week ago and I still don't know how

You should be aware of ich and velvet in this hobby.
Take precautions for your next batch of friends!