There is a lot of reading about FC.
There are a number of varieties to be found for sale as well.
The basics are that they are little land crabs that live on sandy and rocky beaches and scavenge like crabs do.
There is only one entirely FW
crab and that is the Thai Micro Crabs, lives its whole life IN FW
So the FC are somewhat, in my opinion, in need of a little sand bed or place for sunning itself and since all of them come from the sea shore/brackish water/ lagoon type areas, that they would be better off with some salt in their water.
Mine get Hikari Shrimp and Crab Cuisine which are created specifically for their dietary requirements, minerals for molting and foods for health. So I don't worry too much about that.
Being that the shrimp guy said he keeps his fully aquatic and no salt, I feel OK in keeping these guys like I am.
I hope to get a little set up created, like a hamster Habitrail so it/they can come and climb out into an observation pod on top with sand pebbles little twiggy DW and sea shells, like I might do for hermit crabs, lol.
My tank is in my living room and the set up needs to look very nice, so no pink yellow blue green hamster tubes.
lol Need to figure out a smokey tube color and maybe burlap strips inside the tubes for climbing up to the beach!
I think this would be really fun, the crabs would love it, and when I get some grand kids, they would love it!!!
I have just been really busy and haven't had the time to focus on this little project. Maybe I can plan it now and implement it this coming winter.