In my exp. I have three generations of eartworms(Fatty nightcrawlers) in my master organic soil mix. The only ones that make it to pots are either eggs or babies that slip through the sifter. When I re veg these critters have proven quite usefull.I release a batch of 20 pregnant worms that have been isolated and fed soil rich in aerobic mitochondria.For me this is almost as essential as flushing before re veg for airation and natures way of natural selection for which roots are robubust enough.my 2 cents
peace
P.S.
I know u didn't ask but worms have no place in a coco rich ecosystem