During the day, hermit crabs go up into the trees to sleep. then they come down in the evenings and scavenge for food.
Moss can be found in trees in their tropical habitat. So a moss pit simulates a tree!
Step 1: You Will Need.......
Some old time fishing net, lizard ladder, or vine type plastic plant. this will be your hermit crabs' way into the pit.
And reptile moss, string, and suction cups.