Crustaceans dieing - HELP!

[Stumped]

Originally Posted by pulik

How about the possibility of them having starved? New tank, chemistry is well within the acceptable range, everything's growing and doing well - other than a few crustaceans... What's left of the hermit crabs all appear to be thriving now; but then I've also started feeding them directly. They're all ravenous.

There's pretty much no chance they starved seeing as they're all scavengers/opportunistic feeders. Even if you aren't feeding the tank (which you are) they'd still have access to food from the sand and rocks. It's much more likely your tank chemistry isn't as stable as you believe since the tank is less than a month old.