I’ve had a hermit crab obsession for a while now. And it actually started back in the 1990s when I lived in Florida and bought my first three. I did keep them in a big aquarium, but only provided gravel, a shallow freshwater dish, and pellets of “hermit crab food” from the pet store. I think they lived about two years. And it haunts me.
I have learned so much more about their care and feeding since that time and I like to think I’m making up for my earlier ignorance.