Strange Hermit Crab Issue
I bought 5 blue leg hermit crabs for my tank about a week ago. Since then, I've found two dead ones out of their shells. The strange part is that I still have 5 crabs alive and in their shells. I've triple and quadruple checked this. My tank is fairly new and I've never had hermit crabs in there before this. Any ideas on what is causing this? My water parameters are:
Phosphates are a little high as is evidenced by some hair algae growth. Probably from the frozen food.