Hermit crabs make for unique and fascinating pets Their small size and minimal care requirements make them perfect for first-time pet owners However, there are some specific things you need to know about properly caring for a hermit crab’s water needs. Providing fresh water and salt water is crucial for keeping your crab healthy and happy.
In this comprehensive guide, we will cover everything you need to know about a hermit crab’s water requirements, including:
- The two types of water they need
- Proper water dishes to use
- How often to change the water
- Using natural sea water vs artificial mixes
- Signs your crab is dehydrated
- Frequently asked questions
Follow these tips to give your new pet the best care when it comes to their water.
The Two Types of Water for Hermit Crabs
Hermit crabs need constant access to two types of water
-
Fresh drinking water – This is for them to drink and fulfill their hydration needs.
-
Salt water – This is for bathing and keeping their gills moist. In the wild, they would have access to natural seawater.
It’s crucial to provide both fresh and salt water in separate containers at all times. Having only one or the other can lead to dehydration, illness, and even death.
Proper Dishes for Fresh and Salt Water
The water should be provided in shallow dishes:
-
Glass or glazed ceramic – These are easy to clean and monitor the water level.
-
Natural stone – Stone like granite or marble are safe options that won’t leach chemicals.
-
Plastic – Plastic is okay but not ideal as it can harbor bacteria. Avoid brightly colored plastic.
The dishes should be:
-
Low enough for the crabs to easily get in and out
-
Wide enough for the crabs to fully submerge themselves
-
Easy for you to clean and refill frequently
Avoid metal dishes as they can leach toxic substances. Also avoid decorative dishes with paint that could flake off.
Changing the Water Regularly
It’s important to change both the fresh and salt water very regularly:
-
Daily – Replace the water completely each day if possible. This prevents bacterial growth.
-
2-3 times per week minimum – If you can’t do daily, aim for 2-3 times per week at least.
The crabs will dirty the water quickly with food particles, molted skin, and waste. Dirty water can make them ill.
Use dechlorinated water for the fresh water. To dechlorinate, leave a bowl of tap water out uncovered overnight before using.
Making Natural vs Artificial Salt Water
You have two choices when it comes to the salt water:
-
Natural seawater – Collected from the ocean itself. This is best if you live near the shore.
-
Artificial mix – Made by mixing salt with fresh water. Use a commercial blend made for hermit crabs.
If collecting natural seawater, make sure it’s from a clean area free of pollution. Artificial mixes work well too as long as directions are followed carefully.
Pre-mixed salt water removes the guesswork and ensures the proper salt-to-water ratio. Popular brands include Instant Ocean and AquaSafe.
Signs of Dehydration in Hermit Crabs
Check for these signs that your crab may be dehydrated:
-
Lethargic movement or stillness
-
Retreated deep into the shell
-
Gills appearing dry, shriveled, or brown
-
Lack of appetite
-
Slow responsiveness
-
Weak grip or dropping items
Dehydration is dangerous and can lead to death. Offer fresh water via dropper. Seek vet care if symptoms persist beyond 1 day of proper water access.
Frequently Asked Questions
How much water should be in the dishes?
The dishes should be filled enough for the crab’s entire body to submerge, with at least 1 inch of water depth.
Where should I place the water dishes in the tank?
Keep them on the warmer side of the tank. Avoid the food area to prevent contamination.
Can I use filtered or bottled water?
Yes, as long as it’s dechlorinated. Let bottled water sit out overnight to dissipate added minerals.
Do hermit crabs drink the salt water?
No, they have no need to drink salt water. The fresh water dish provides all their drinking needs.
Should I use water conditioner?
Water conditioners are not needed if letting tap water sit out overnight. But you can use if desired.
Can hermit crabs share a water dish?
Yes, but have multiple dishes in case one gets contaminated. Provide 1-2 water dishes per 5 crabs.
How can I get my crab to use the water dishes?
Try placing them in the crab’s preferred habitat area and lowering the edge closest to them.
Providing Proper Fresh and Salt Water
Giving your hermit crab constant access to fresh drinking water and salt bathing water is crucial for keeping them healthy and content. Use shallow natural dishes, change completely 2-3 times per week minimum, and watch for any signs of dehydration. Proper water is vital for your crab’s survival and happiness!
