I've got a question about substrates and humidity. When I got Boris he was mildly pyramided, so I've been trying really hard to prevent this from getting worse (right foods and not too much of them, humidity, etc). Half his enclosure -- the hot half -- is a 50/50 topsoil and sand mixture, and I keep that damp (his water dish is in that half also). The other half -- the cool half, where he sleeps) is hemp (I think this might be like aspen that you use in the States, but I'm not sure -- lots of people in England now use hemp for their substrate). Boris loves to burrow in the hemp and he's much happier with that in his sleeping half than he was when it was all sand and soil.
My question is, the hemp half is completely dry, and as Boris spends a lot of time in that half -- that is where he sleeps -- is this OK? He does bask in the damp soil half, and does most of his eating there, but he doesn't burrow into it and just sits on top, so is he getting the benefit of the humidity there? I don't think I could have him sleep in a damp environment because it gets very cold in my house at night and I don't think he would do well in the cold and damp, and anyway I think the hemp would go mouldy if it were damp.
What is it about a damp substrate that keeps them from pyramiding?
Nina