Hi everyone. My purple pincher hermit crabs usually have pale eggshell white tips to their larger claws, but this morning all my crabs had brownish claw tips. They seem to be healthy and they act normal, but this strange coloration has popped up overnight. What's going on? Is it harmful? It has been chilly these last few nights, and their heater is not to the proper wattage (I'll have to get another one soon), is this contributing to or causing the problem? Thank you.