Advertisement I found a lovely N. americanus while on a collecting trip this weekend and have decided to keep it as an office pet! I have not yet sexed it, and currently have it in a Critter Keeper that is about 3 gallons. The bottom half of the substrate is organic potting mix, while the top half is ZooMed Creature Soil (soil, sand, peat, carbon). I have added some bark, branches and moss from it's original habitat as well. I am aware there may be too much airflow in my current set up, so I have been working to keep the substrate moist. I have also purchased a calcium supplement. Is there anything else I should do or should change? I may add another of the same species, I also know where I can get some Polydesmida (Xystodesmidae), but have not been able to identify the genus or species yet. Can these be kept together?