HCA: Hermit Crab Association

Thank you for your answer. I would like to use small glass aquarium-type tanks. In the "Crab Central Station" videos, hermit crabs are walking on the bottom and climbing. They really seem to be having fun and being healthy. I don't understand if they dive only in salt water tank or also in the fresh...

Hello from Italy. My name is Federico. I'm setting up a 53 gallon tank for my hermit crabs. I'm thinking of placing two small aquariums inside, buried in the sand, like salt and fresh water pools. I'm taking inspiration from the central crab station videos. Do you think a tank depth of more than 7.5...