Those 3 are in my 5g with 20 RCS, 2 tiger shrimp and a few b. brigittae. Took a gamble with them, the shop owner who "sexed" them said they were females, but I suspected dominance or stress played a factor in throwing off the analysis.
I've tried to do a hornwort & anacharis forest with two tall columns of java moss on the sides of a large lava rock in the tank. In the middle there's a banana plant, so that area is quite crowded and the little guys love it. I've got a nice copepod & pond snail/mini ramshorn population going too-have you noticed if yours have taken to snails yet or at all?