u/Dino_SurpriseJr

I am hosting the classroom hermit crabs for the summer, there are 2 in the 20 gallon tank. One stays in the coconut shell all day and all night, and I can't tell if it is eating or using the water. At the school they were feeding it hermit pellets. I am giving it veggies, fruits, mealworms, leaves and things like that. But I can't tell if it has left the coconut shell at all. The second crab is missing. My kid says that it disappeared about 2 months ago, and maybe it is molting. Anything I can do for it if it is buried somewhere in the substrate?