I have a problem concerning mold and molters

[ladybug15057]

It would not be surprising at all if they do decide to do a molt after receiving what they need to do so with successfully. I would suggest to leave them be, no digging, brushing/blowing of the substrate... nothing. Hermies have been known to prolong molting if the conditions are not right for them to survive, but there are those times they do not have the choice.
If the temp is 72*F this is ok for the cool side, but there needs to be a warmer side to the substrate of 78-80*F too. But if you do not know where they buried, do not try to bump the heat now.

[joshholman]

Ok thank you for the info. I'm going to put my little crab Marley in the new tank, He just seems so lonely. I will keep you updated on how everything goes with my new pets.
Wish them luck!!

[appps]

I've found nothing seems to make crabs go under like an owner with a brand new tank for them lol

While I'm no expert I'd move the one on his own over since he is going to be by himself either way and just keep an eye out for the others and add as they come up. I'd also do a bit of listening at night because often when I think mine are under I'll still hear then banging round against the glass at night so you may be able to grab another one and move across then.

As for mold only time I've had it was when I had timber touching damp sand, the timber grew mould. Just check you haven't got the substrate too wet in that spot that started growing the mould.

Good luck!!

[joshholman]

Just an update, since i upgraded to the bigger tank I have had four successful molts and all the crabs are more active and healthy. I have a 29 gallon tank with a screen lid covered in plastic wrap to keep in humidity. they really enjoy climbing the wood up to the screen lid then hanging from the top. now that i have the proper set up my crabs are healthier than ever