Haiti Hermit Crab

Temperature: Keep the temperature of the enclosure between 72–82°F. You can use a tank heater or clamp lamp to maintain the temperature. 
Humidity: Keep the humidity level between 60–80%. You can mist the tank with dechlorinated water to achieve this. 
Substrate: The substrate should be deep enough for the crabs to bury themselves, but not so deep that it prevents the undertank heater from working. 
Food and water: Provide shallow bowls of freshwater and saltwater for the crabs to access at all times. You can also feed them a calcium-rich diet, such as crushed cuttlebone or a powdered calcium supplement. 
Bathing: Give your crab a bath twice a week for about 30 minutes to replace the water in its shell with clean water. 
Light and dark cycle: Provide a 12-hour day and night cycle for your crab. You can use a desk lamp or aquarium light to create this cycle. 
Social: Hermit crabs are social creatures that like to live in groups. If you add more than one crab to a tank, keep an eye out for fighting.