Hermit Crab Humidity: How to Maintain Healthy Humidity Levels for Your Hermit Crab

The ideal humidity level for hermit crabs is around 70-80%. Humidity is essential for hermit crabs, as it helps to regulate their body temperature and humidity levels. Using natural sponges and humidity gauges, you can ensure that your hermit crab tank is humidity-rich and healthy. 

Remember that hermit crabs need fresh and saltwater to stay hydrated, so be sure to add both to their tank. In addition, add moist moss to the tank to provide additional humidity and comfort for your hermit crab.

Why Humidity Is So Important for Hermit Crabs

As mentioned, humidity is essential for hermit crabs because it helps regulate their body temperature. Without moisture, hermit crabs will experience dry skin and difficulty moving around. Humidity is also crucial for hermit crabs because it helps moisten their shells.

Ensure adequate humidity levels in your home by adding a moisture-absorbing agent like mist or spraying water onto the walls and floors. 

How to Make Your Hermit Crab Cage Humid

Keeping hermit crabs comfortable and healthy is essential for their longevity. To do this, it’s crucial to increase humidity levels in their crab tank. Humidity helps to prevent diseases from spreading, and it also helps to keep the crabs comfortable.

Make Use of Natural Sponges

One way to keep your hermit crab’s humidity levels high is by using natural sponges like moss or leaves. You can also help provide this humidity level by placing the sponge in a moist area close to the hermit crab’s tank or home. 

Make sure the sponge you choose is safe for your hermit crab, as some are not. Remember to check the sponge regularly for signs of mold or fungus and replace it if necessary.

Install a Humidity Gauge in the Hermit Crab Tank

Maintaining a humidity level in your hermit crab tank can be a difficult task. But with the help of a humidity gauge, it becomes much more manageable. This nifty device monitors the humidity levels in the tank and tells you when it’s time to water the crabs. 

There are a variety of humidity gauges on the market, so be sure to find one that’s affordable and fits your needs. Additionally, install it where you can easily see it, and ensure the water sprayer is turned off when not in use. By doing this, you’ll be able to keep your hermit crabs healthy and happy!

Hermit Crabs Need Both Fresh Water and Saltwater

Hermit crabs need both fresh and saltwater to survive. A house with a pool or ocean will provide enough of both for hermit crabs. Ensure the water is at least 75 degrees Fahrenheit and has about one teaspoon of ocean salt per gallon for each crab. If your home doesn’t have a pool or ocean, add fresh water to the tank regularly.

Airstones Can Be Useful

Airstones can be a helpful way to increase humidity levels in your crab’s home. They work by drawing moisture and water vapor from the air, raising the humidity levels in the crab’s environment. 

This can be useful in decreasing drafts, keeping pests at bay, and even helping the crab to feel more comfortable and energetic. Replace airstones every week to ensure they are providing their full benefits.

Ensure That the Crab Has a Proper Habitat

Hermit crabs are lovely little critters that require humidity and sunlight to survive. Ensure you provide these essential needs before bringing your crab home, and be prepared to mist or water it daily. 

If you’re unsure how to care for your crab, don’t hesitate to consult a hermit crab expert. And once your crab is settled in, be sure to enjoy its company!

Add Houseplants to the Room

Adding plants to your home is a great way to brighten up any room and improve the air quality. Not only that, but houseplants can add life and color to a room. Be sure to buy a plant that will increase, which is crucial for keeping your hermit crab happy and healthy. 

In addition to houseplants, add greenery like a tree or shrub to brighten up any room in your home. Many house plants are low-maintenance and easy to clean, making them an excellent option for those with busy lives. So, go ahead and add some plants to your home! It’ll be worth it!

Buy a Humidifier

To stay healthy and avoid illness, hermit crabs need a humidifier that can maintain humidity levels of 70-80%. 

Humidity levels will change depending on the season and how much humidity is available outdoors. So, always check the humidity levels and adjust the humidifier as needed. For example, buy a humidifier to add moisture if you find your home is dry.

Make sure to adjust your humidity levels as needed, and be sure to keep your hermit crab habitat well-maintained to ensure a happy crab!

Trap Moisture Inside

Trapping moisture inside the tank is one of the most common and effective ways to increase humidity in crab tanks. This is done using a mechanical device that traps water droplets inside the tank, thereby increasing humidity levels. This method can be used alone or in combination with other methods, such as adding water vapor to the air using a humidifier or sponge.

Water Bowls

Keeping a water bowl in each crab’s enclosure is essential for them to drink. Please make sure the tank is humid enough by adding a moisture vaporizer, and keep it clean so that the hermit crabs can drink without getting sick. You should also ensure fresh water is available at all times, as hermit crabs get thirsty quickly.


Misting is one of the most effective ways to increase humidity in your crab tank. Add a few drops of water to the water dish daily, and your crabs will be happy as clams! Make sure to keep the misting area clean, so the humidity doesn’t build up over time.

How to Reduce Humidity in the Crab Tank


It is essential to ensure the tank has good ventilation so that the hermit crabs can breathe fresh air. Additionally, keep the tank clean at all times – hermit crabs love dark and damp places! If you have to give them water, only do so in small doses and ensure it is away from their food.

Using Sand

Adding sand to water is a great way to keep your crabs healthy and happy. It helps reduce humidity levels, which keeps rabies happier and healthier. Make sure to change the sand every two weeks for the best results!

Water Control

One way of reducing humidity levels in the crab tank is by controlling water levels. By doing this, you can ensure that the water level remains consistent while also regulating moisture content. Additionally, a moisture meter can help you measure humidity levels in your crab tank and take necessary corrective actions accordingly.

Temperature Control

Keeping your tank’s temperature at around 75-85 degrees F is essential for the crabs to be healthy and active. They will start shedding their shells and becoming more active if it gets too hot. Make sure there is enough humidity in the tank.