How To Keep Your Hermit Crab Tank Humid

By | August 2, 2022
How Long Can Hermit Crabs Live


Hermit crabs are an exotic pet that can fit in any home. They are easy to care for, and require minimal maintenance. But, one important factor to consider when keeping hermit crabs is the humidity levels in their tank. Hermit crabs need a moist environment to keep their shells healthy, and to make sure they don’t dehydrate. In this article, we’ll explain how you can keep your hermit crab tank humid.

Humidity Requirements

In order to keep your hermit crab happy and healthy, you’ll need to maintain a humidity level between 70 and 80 percent. This means that the air in the tank should not be too dry or too wet. Too dry of an environment can cause the hermit crab to become dehydrated, while too much moisture can cause mold and mildew to grow in the tank.

Ways to Increase Humidity

There are several ways to keep your hermit crab tank humid. Here are some of the most popular methods:

  • Using a Humidifier: Using a humidifier is one of the easiest ways to keep your hermit crab tank humid. Simply plug in the humidifier and set it to the desired humidity level. This is a great solution for those who don’t want to constantly monitor the humidity levels.
  • Mist the Tank: Mist the tank with a spray bottle filled with dechlorinated water. This will help increase the humidity levels in the tank. Be sure to mist the tank at least once a day to keep the humidity levels up.
  • Add a Water Dish: Add a shallow water dish to the tank. The water will help increase the humidity levels, as well as provide your hermit crab with a source of drinking water. Be sure to change the water every few days to prevent the growth of bacteria and algae.
  • Use Soil: Adding a layer of soil to the bottom of the tank can help increase the humidity levels. The soil will absorb the moisture and help keep the humidity levels up.
  • Create a Humidity Chamber: You can create a humidity chamber by adding a few inches of moist soil to the bottom of the tank. Place the hermit crab in the chamber overnight and the humidity levels will increase.

Monitoring Humidity Levels

It’s important to monitor the humidity levels in your hermit crab tank. You can do this by using a hygrometer. A hygrometer is a device that measures the humidity in the air. Place the hygrometer in the tank and check the humidity levels every day. This will help you make sure that the humidity levels are within the optimal range.

Tips for Maintaining Humidity

Here are some tips for keeping your hermit crab tank humid:

  • Use a Dehumidifier: If the humidity levels in your tank are too high, you can use a dehumidifier to reduce the moisture in the air. This will help maintain the ideal humidity levels in the tank.
  • Ventilate the Tank: Make sure to ventilate the tank to prevent the air from becoming too stale. You can do this by opening the lid of the tank for a few minutes each day.
  • Keep the Tank Clean: Keep the tank clean to prevent mold and mildew from growing. Clean the tank regularly to maintain the optimal humidity levels.


Keeping your hermit crab tank humid is important for the health of your hermit crab. By following the tips in this article, you can easily maintain the optimal humidity levels in your tank. With the right care and maintenance, your hermit crab can enjoy a long and healthy life.