Thin layer of Oily surface for copepods bucket

[nemotang2019]

I have been growing and harvesting copopods in a five gallon bucket for the past few months with no air stone agitating the surface. For the past few days,I’ve noticed a thin layer of oily stuff covering the entire surface, and I was wondering if copepods will be okay like that, or if I should change the water to get rid of that oily surface? See attached video.

 

[tzabor10]

Did you end up changing the water?

 

[nemotang2019]

Yea it was time to change the water. The oily surface didn’t seem to have affected the copepods at all. Still harvested a lot.