Windsoryardner posted about the use of beneficial nematodes in their community garden in this topic:
https://www.helpfulgardener.com/forum/vi ... +nematodes
I hope the link works
but you can also do the search by entering the words beneficial nematodes and the topic is somewhat near the bottom of the search as it is on a post that started in 2011.
I didn't see anything on using them indoors in the posts however.
Hopefully this helps.