Copepods or something sinister?

[Sarah1990]

I added copepods to my sump in febuary but never saw them again. Then I ended up going fallow for 11 weeks which ended 5 weeks ago and now theres lots of little white things. They are crawling on the sand and glass and occasionally floating into the water column. Could it be the pods were being eaten but then got to explode while fallow ir have I not QTd properly?
I'm struggling to get videos to upload

 

[Reverend Turtle]

Most likely pods from no predators.

 

[Sarah1990]

Maybe these will work so you can see better

 

[Redfoxtang]

Definitely pods! Nothing to worry about!

 

[Sarah1990]

Definitely pods! Nothing to worry about!

Thank you, do I need to add phytoplankton now to keep them alive or should they be ok? I've not been adding any since thinking they were dead ages ago

 

[Redfoxtang]

You can to help them repopulate faster but they will still repopulate and spread throughout the tank.