Black balls that turn into little black flies.

Wet

Member
I've been working with rockwool for about 3 weeks now and I just noticed these little black flys around my rockwool, I've sprayed Captain Jack's Dead Bug and was wondering if this application would help me get rid of this little bastards!
I also cut up some small potato wedges sprayed them with Captain Jack's and put them on top of my rockwool. What's another way to get rid of these little flys?
 
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