OK folks, I'm really into substrate, as a breeder of isopods, and want to do a setup where they have room and substrate to dig their own tunnels. I'm using a largish sterilite container, with a slightly smaller one nested inside so I can try and see them up against the walls of ... You know what I'm talking about. The inner bin will be their "innie outworld" and they'll have a floating island in there for them too.
Anyway, what "recipe" have you guys used in the past for digging medium? I've seen things with clay and sand but I guess I'm looking for ratios maybe? Or really any reccommendation?
Please and thank you.