Day One, bringing the first crab home: Pepper and Luna are always watched carefully when they interact with the crabs.
Week Two, first attempt at setting up the new tank. We used sand from a beach near our apartment, it was strained through a fine mesh strainer, and baked to make sure that there were no parasites before it was added to the tank.
Three Days later:
A week Later: There is small brick of coconut fiber to absorb the excess moisture from the substrate because I used too much water, It has already been broken up and mixed with the old substrate to get the correct consistancy.
Pepper was shooed away after this picture was taken, we found her like this when we came home from the store, she just likes the heat from the tank light.
Today:
Sorry It's a little picture heavy, but I was excited. So we have three purple pinchers, their names are Drace, Crabbe, and Goyle, hince the Slytherin Decal on the front of the tank, all the crabs came in shells that had a clear coat on them, you can see on Goyle, the crab with the green shell that there is a large drip on the shell, they have since all changed out of those shells, and after a 24 hour buyers remorse time frame the shells were removed out the tank to ensure crab safety.
If any one has any tips they would like to share please feel free, I'm open to all suggestions!
if possible, try to give them more things to climb - oak tree branch (free of pesticides/fertilizer) pop in freezer or oven to debug. For water bowls I would recommend double bowl Tupperware method/ & put something in there on bottom & so they can get out safely 
What happened was my gage got saturated and wasn't reading actual tat conditions. I think it was too close to my water bowl maybe? I don't know. But I thought I should mention what happened to me since from the picture it looks like you may be having a similar problem, and you may not know it. 