I have a nhandu valpinus...You can just keep yours like I keep mine. Water dish and a hide....Its funny though cause I changed my N valpinus' hide like last month sometime and it blocked its self in the hid and I haven't seen it since...and I don't think it could be in pre molt because after it molted a while back it only ate like 10 crickets at the most. So I don't know what its doing.My girl is nearly 5" now and still LOVES to burrow. I keep her on a dry peat/potting soil blend with a water dish and a coconut shell hide. I just give her a 6"+ deep substrate beneath the hide and let her go to town. She digs her burrow all the way to the bottom of the tank, but stays in the open all the time unless I'm disturbing her to do tank maintenance.