>>81528880
>they look like they're cuddling
yes! they are engaging in a courtship ritual. this species is pretty hedonistic, as they mate often without producing any offspring

>methods and metrics for what gets introduced in the terrarium
pretty much everything I add is washed and/or sanitized in order to prevent hitchhikers. I mostly collect sticks, branches, foliage and fallen leaf litter for my tanks. most hitchhikers are harmless desu. in my area, I just have to watch out for centipedes and ants.