HCA: Hermit Crab Association

Thank you I will definitely keep things clean. Do I need the hydrometer/ thermometer? and what is the best kind to get?

Thank you to both of you. I really liked the link. I am at the ocean for a few days but will get them an aquarium as soon as I get back home.

I'm brand new to hermit crabbing. I have 4 purple claws. I was told to never put in substrate as it breeds bacteria but to keep the crabs in a wire cage and take them with me to work etc. I don't want my crabs to get sick. can someone advise me?