My biggest worry is getting a contaminated culture.
It's not really like a microbial culture in a petri dish, it's just worms on peat or scrub pad.
I'd say all cultures are already 'contaminated 'with fungi, and older, maybe neglected ones can show fungi in larger colonies. Sometimes springtails appear. The common practice of starting new cultures every 2-4 weeks makes it much less of a problem.
Guys anyone wanting a female there is a fella selling a pair in the SNS section right now!! I can vouch for this guys as I picked up 20 fry from him about 4 months ago. Unfortunately they took longer than I expected to mature so I gave some away and sold the rest. Here is your chance at that elusive FEMALE BADIS!!! Sorry didn't mean to give the guy some free pub for his sale lol.