Advertisement As we all know, H. arizonensis finds extreme difficulty molting in captivity. Most keepers agree that it is nearly impossible to raise one that isn't already an adult. The reason for this is generally agreed to be impossible-to-recreate wild humidity. The H. arizonensis lives in a very dry desert, but deep in its burrow, it's humid enough to molt. Obviously in an acrylic enclosure, this isn't the case, so I have an idea for how to fix this. Get a really tall cylindrical enclosure. This way, the scorpion can dig the spiraling burrows that it usually makes in the wild. At the base, drill one or two VERY small holes, maybe a millimeter in diameter. Through these holes, you can use a thin pipette to inject some water into the bottom of the substrate. In case the hole leaks water or sand, you could cover it with tape or sticky tack. So that's just my two cents. The water under the ground would create humidity in the scorpion's burrow so it could molt. It's worth a shot.