Salt AND fresh water is required! The hermit crab will make up his own mixture of water that he keeps in his shell. Great example of proper hermit crab pools! :) Crabitat Pools by ~GodzillaHermitCrab on deviantART
Things about hermit crabs.need to know for class pet : Cuddle factor depends on the individual crab, I had one that never hid when I picked him up. I even had him trained to sit on my shoulder like a parrot.
How to Care for Hermit Crabs. Hermit crabs (affectionately called hermies) are great pets to have. They may not be as cute or cuddly as a puppy, but they are fun to play with and will teach kids the meaning of caring for another living.
Also known as pill bugs, rollie pollies, doodle bugs, and sow bugs. These can be used eat moldy food and waste in your crabitat. Use the appropriate number of rollie pollies depending on the number of hermit crabs and the size of the tank.
Extra care should be given to a molting hermit crab when the time comes and there are many theories on how best to assist them. Unfortunately, some beginner crab owners don't quite know what to do when the hermit crab molts.