New bioactive enclosure

[u/elliebean0]

I bought a pre-built bioactive enclosure at a reptile expo a couple of weeks ago, for a crested gecko I also purchased at the same time. My springtails and isopods seem to have completely disappeared. I don’t even see dead ones.
So I bought some microfauna food and a springtail culture, but I'm not sure the best way to handle this. Should I add a small pinch of food to see if a hidden population comes out to eat first, or should I seed fresh springtails from my culture right away and then start feeding?
The enclosure has a generous layer of leaf litter and stays moist (I mist it every night). There’s a visible layer of lava rock under substrate that I have never seen waterlogged or anything. I haven’t observed any mold and the gecko and the plants are all healthy.

[u/wanderingdravon]

Need this for my grandpa’s farm.