slow means they are feeding locally, I.e., eatin yer plant, good helpful predatory mites are fast as lighting, kitten as a cat, and rather dashing **blush**
I personally would leave, them sometimes you can develop a wonderful case of insects that actually help you. Keep an eye on them see if you can figure out what they up to.
I once had a case of paper wasps that built a nest in my veg room wall to over winter. I also had thrips. I decided to give them a chance but if anyone ever got stung they would all die. These paper wasps killed all the thrips , then they went dormant and moved on in the spring.
I also have spring bellies that flair up when ever I have a soil rot or too much moisture. They are my little clean up crew.
I also have worm bin..........
So ya working with nature can be helpful sometimes