Hermit Crabs are very cool, and social creatures. In order for them to survive, you have to really simulate their "Natural Habitat."
Step 1: Simple supplies
Some basic supplies you will need is:
bedding: play sand, Eco earth, Jungle Bedding
Salt Water: Oceanic sea salt mix, Distilled or spring water
Fresh water: bottled spring water, or distilled water
Bowls:You will need three bowls; One for fresh water, one for salt water, and one for food
Heat Source: Light, Under Tank heater
Hiding spot: coconut hut, driftwood pine and ceder is poisonous to hermit crabs!
Humidity: humidifier, or mister
Tank: Ten gallon glass aquarium MINIMUM