pest problem or not? please help urgent

[hermit crab]

There are tiny white sea creatures all over the
glass and the sea shells and the back wall of the aquarium.
When I really look really up close to the glass I can see them moving like tiny white bugs and there are alot of them floating around in the water also.

I am not sure if they are dangerous or natural.I had called to the lfs and asked them and he siad that they are somthing called copo pods and that they were good to have in your tank,But then I called another fish store
and the owner said they are not copo pods because copo pods are only in the sand not on the glass or anything else.

Any info would be great.

I would send a picture but I dont have a camera sorry

 

[scuba_steve]

they are good thing to have no worries

 

[Hara]

Also, from the replies from your lfs, I would not trust the advice you get from store number 2. Copepods live on liverock and any other surfaces.