Hi Hi Hi
ive had some of these guys before and they are interesting. We (science) knows almost nothing about them but that there are 100's of species that vary in size, color, habitats? makes them more appealling i think
i dont have pictures but my setups were long, wide and short. nothing in them but peat moss, mixed with some more dense chippings, rocks that were positioned to make cave-like dwellings possible. The experience i got from them most was learning different type of ground cover. java moss, baby tears, Suzi Wong, Selaginella kraussiana, riccia and even lawn grass. The nice part of the ground cover was how it kept them from tracking dirt along the sides of the tank and helps absorb their outputs. the downside is you need lights and timers.
. i hope this helps a little bit.
also watch their bites. it only happened once but it was definately sharp.