HCA: Hermit Crab Association

Yes; crabs are marvelous teachers of that almost-extinct virtue, patience.

My resident crabs seem to be doing about the same thing. I actually find that extended rhythm kind of a relaxing change from the other animals, who always seem to be needing something, every day, usually multiple times a day. It's an interesting change to have some who "go on vacation" for a good long while every now and then.

what are the signs on the crab of molting? I saw a few pictures, but i'm still not sure.

The signs of molting on that info sheet are good, but it presupposes moving molters to an iso, which isn't necessarily the thing to do. If your tank is large enough, not too crowded, and substrate deep enough, and you feed good sources of protein and chitin, they should be fine molting in your main tank.

Ours have been through two molting cycles now, and the real giveaway that they were getting ready to molt, both times, has been the salt water disappearing in large quantities. They ate enormously right before the first molt (that may be because, before we got them, they had been fed on nothing but FMR hermit food and fruit treat, so they were starved for fresher food), but I didn't see any noticeable increase in eating before the second molt--but both times there was significant depletion of salt water. I couldn't really use digging as an indicator, either, since all of them seem to dig pretty regularly whether they are molting or not.

The surest sign, though, is when they dig down and stay down, and then you don't see them for days and weeks and months on end. Then, you can be pretty sure they're molting!