I have 3 hermet carbs but one thing you need to know is that hermet carbs will pinch and make you blead if it’s big and mad and I say that when you get a hermet carb you hav e to clean the cage every day and hermet carbs that I buy is from petsmart and on sale now the plane hermet crabs cost $4.59 and the colerful shell cost $5.59.  You should probly know that tthey change shells all the time so have 3 or less in the cage at all times it lays eggs if it thinks it’s by the ocean and they can drownd and they like rocks and sand.  They eat fruit and spungcakes and they will sleep at day and wake up at night.  The hermet crabs need a house to sleep in.  You’ll need a spung in the water so they can drink.  I had a grape or two cut up into 4 piacies and my big one at all of it in 1 hour.  If your hermet crabs barey there self they might be getting used to their surowndings if in three weeks and still bared dig it up if it smells like raw fish then it’s dead.  Oh ya here’s the worst part… change the food and water every single day and every week clean the cage and always keep a eye on them because they are very good at climbing and love dark places like… you coush or chair and your vents.  So have a good day with your hermet crabs!!!!!!!!!!!!!!!!!!!!