I have been trying this variation for months now, and thought I would share it with the group. It is certainly not new, it has been used in differant variations for a long time, with scorpions. It is known as the "false bottom". But my idea is to use vermiculite, instead of gravel, to maintain moisture levels better. I have never heard of this being used with T's, and thought I would try it. I have found, it works very well. I use it in my T.blondi enclosures, and they are very happy, and have had perfect sheds, every time. It maintaines high moisture for at least a week, and in most cases much longer. And the dirt or peat, does not get too wet, to avoid any problems with mold. It seems, the top layer stays fairly dry, while the bottom layer absorbs some moisture. It stays humid enough, that there is condensation on the cage walls. High humidity, especially considering that the top soil is dry. It is much more effective than just pouring water into the soil, as I do in dealing with my Haplopelma's. I use the same set-up as the scorpion cages, with the straws to the bottom, to periodically rewater the vermiculite, which is medium grain size. Has anyone tried this? I am very happy with the results, I have seen no downside to it, and have not had to add water to my T.Blondis cages in weeks!!