How can I verbs a crabitat next to a buried ascetic crab?

I have 4 healthy hermit crabs surrounded by incremental sizes from medium-small to large. The two smaller crabs came up from molting about 1 month ago and the biggest, who found and enjoy a secret underground flowerpot for about 2 months, dug out just nowadays looking like new again. The final crab finished molting about 3 weeks ago but buried below again a week later and I haven't seen her since.

Could she be molting again already, or is there any other intention that I shouldn't (carefully) disturb her? The 30gal crabitat is due for new substrate and I would like to get it changed since the little crabs decide to molt again. Thanks in advance for your suggestion!
Question roughly red eared turtel?
Answers:    Yes change out your substrate if its due. She sounds like she have found a spot she likes. Just carefully remove her and keep her covered until you put her posterior in the clean cage after just let her have at it. I bet she'll step back down there. Don't be worried.
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