Hermit crabs with problems..

[Rubberducky]

So basically, I think my hermit crab may be sad or is just living his normal life. He used to be a lot more active, but now he usually climbs up to a stick and stays there for the day and will occasionally come down to eat. I don’t know if this is because he’s lonely or because the sand is kind of cold. I do have two hermit crabs, but they live in separate tanks because when I try to put them together, they fight each other.

[curlysister]

What are the heat and humidity in the tank?