I've been keeping hermits for about a year now. As I said, I use the EcoEarth shredded coconut fiber as a substrate, about 2"-3" deep. It's very moist (comes in a hard, dry brick you soak to pull apart), I moisten it with a mild salt water rather than plain water because I read that helps deter any mold growth. I also use a 10 gallon tank for mine with a glass lid to keep it humid. I got a sheet of coconut fiber backing that I cut up and made ramps and hammocks with. Instead of using those pricey/pretty water bowls from the pet store, I got a pet dish that had two "bowls" in it and put a clean rock in each one so the crab could climb up on to get out. One side is salt, one is fresh. I keep the crabitat warm with an under tank pad heater for reptiles which also keeps the substrate warmed and thus humidifies the whole tank. Because the lid is glass, the humidity stays constant. I also hung some fake plant material from the shell changing hammock for decoration. I use a small ceramic bowl I had on hand for a food dish and a scallop shell half as a treat dish. My hermies climb and explore their area and if I can't find them, I know they are buried in the substrate sleeping. I'm not too sure on the lamp for them, they are more of a nocturnal creature which is why he was probably hiding from the lamp before. I made the hammock for a shell changing area because if the shells are on the substrate, they bury and fill the ones they don't like. Also, that special hermit crab sand they sell for outrageous money is a scam. Make sure you feed them a variety of real food, not just the pellets sold for them. They need beta carotene to keep their vivid colors. Mine love applesauce (treat dish) and carrot shreds, boiled egg whites. I'll see if I can attach a pic later. I don't spray my crabitat down with a misting bottle daily because as I said, the coconut fiber is very moist and the heat and glass lid all combine to keep it relatively humid in there.