I have 4 crabs in my large tank. Two have molted. Brat was down for a few weeks. He molted and has been back up for a little over 2 weeks now. I should also point out that all 4 crabs buried at the same time. Jay-Jay just did a surface molt, he's still not moving around but he does move in his shell, all looks well. Heres my concern: Daisy and Georgina have been down since they all buried. Since 2 of the 4 are back up, why are they still down??? They are a little larger than the other 2, so if they are molting it may be taking longer because they're bigger...??? I haven't seen them at all, and I haven't heard any scratching or ANYTHING. I worry that they have died. What do you think?