So I've had my emerald crab for about 4 weeks now and he's been very active day and night. Over the past couple of days he hasn't been moving all that much or eating and he keeps rubbing his shell. All the corals, fish, and crabs in the tank are doing great and water parameters and temperature are in check. Can anyone enlighten me on what might be wrong? I suspect maybe getting ready to molt but I'm not experienced enough to know if this is the case. Thank you!
. they tend to hide and not do much before a molt.

