Nobody has any experience or input with this?
I run worm bins, but also grow in a large indoor pot (about 4 feet in diameter) with worms in it. It's impossible not to introduce worms into your grow if you use your own castings. There are only red wigglers in my bins, but in my pot I have 3 or 4 species... I also introduced deeper borrowing regular garden worms (eastern Canada), and dew worms from our outside garden as well. I also put in some bait worms I bought from Canadian Tire LOL, which I assume are likely European night crawlers.
I don't do anything special to keep them alive and fed. As my cover crop dies, they eat the stuff on top along with the hay and alfalfa mulch I add later. The deeper borrowing species eat the roots of the old plants from before. Sometimes I do throw some coffee grounds or something else for a treat to the top surface of the soil that falls into the mulch. The worms like that. I feel as long as things are recycling quickly, all is going well.
One tip I can offer is to use a thick mulch that keeps the top soil surface at least a bit moist at all times. Red wiggles, fungi, nor bacteria will eat dried out crap at the surface, and once the top dries out completely it will take some time for bacteria and such to awake again at that zone. Aim for stability rather than major swings in hydration.
