Yeah, I will probably try to smaller tube. I honestly think what he/she cares most about is darkness over anything else, so as long as it is dark, he/she probably wouldn't care as much, since I am not breeding. I this his/her biggest issue with the newest "home" is that it has a fairly large hole in the top of it that lets a quite a bit of light in. The last cave had a hole in the top too, but not quite as big. If he/she had his/her preference, the tank lights would never be on. I have considered getting moonlights to see if that would allow me to see if he/she would be more comfortable coming out at night time and I would actually get to see him/her, since I am a night owl, but it's on the to-do list...