HCA: Hermit Crab Association

I've for a 40gal breeder tank but it's currently divided in two because I have a lethargic and not so lively hermit. Who I'm worried is having a very slow death...

I ordered 2 online and the lethargic one ended up molting so I ordered 2 more from the same place and upgraded from my 20 gal. At first I had all 4 together but noticed the molted one being picked on ans then got slow, doesn't react much (or at all) to me in and out of the tank. So.i separated. But his tank mate was fine with the other two. I saw crabby yesterday. Today, no sign of it. There are tracks that look like attempts at tunneling but no holes in the sand/coconut dirt anywhere.

What should I do for crabby, and what's up with hermie?

The other two have yet to be named.

I've got a 40gal breeder tank but it's currently divided in two because I have a lethargic and not so lively hermit. Who I'm worried is having a very slow death...

I ordered 2 online and the lethargic one ended up molting so I ordered 2 more from the same place and upgraded from my 20 gal. At first I had all 4 together but noticed the molted one being picked on ans then got slow, doesn't react much (or at all) to me in and out of the tank. So.i separated. But his tank mate was fine with the other two. I saw crabby yesterday. Today, no sign of it. There are tracks that look like attempts at tunneling but no holes in the sand/coconut dirt anywhere.

What should I do for hermie, and what's up with crabby?

The other two have yet to be named.

Addition:
It's possible that the 2 new ones ate crabby and took his shell... but they have so many choices!

Crabby is missing

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Hermie has been sitting there like this all day.

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I would add some extra protein to their food dish to help make sure there's no violence and maybe even set up another dish for the crab your worried for.
He might just be hiding in other hide outs.
Also make sure your temp and humidity are where they should be.

I hope this helps good luck!

To clarify - you bought 2 crabs originally, then when one was molting you bought two more.
When did you move them to the new 40 gallon tank? How long did the crab (which I believe has been ID'd as an E) stay underground molting - did he come up on his own, or did you dig him up to move to the new tank?

Hermie was under for at least a month. I set up the new tank and transfered crabby but left hermie alone to finish what they were doing underground. I absolutely did not dig them up, that'd be a terrible idea. I waited 3 days before putting them in with the other three. My humidity is around 85-90% and heat about the same. I give them 6-7 different types of protein, a dried fruit, oats, and seed mixture, a veggies and herb mixture, fruit salad of dried cranberry, apple and mango, and peanut butter treats, and dried coconut. Occasionally I give them fresh fruits and veggies. I've recently taken most of the decor out of the enclosure and still no sign of crabby... Hermie has their own food and waters and seems to be eating still.

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Are they getting darker?

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Sorry, I'm still not certain of the situation.
All crabs were moved over to the new tank, but now the one who had been underground is slow, and the other original crab is missing?

Yes, that's exactly right.

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So... mites or sand?

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Today is bath day

Please don't bath your crabs - they will bath themselves. They carry a mix of salt and fresh water in their shells, and if we put them in the pools, it will mess with that mix. Also if you are concerned about a crab, handling and bathing them will be more unnecessary stress.

Hermie switched shells a couple times which made me hopeful, but at the beginning of the week they passed away.

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