I have just got a strawberry conch and when I saw him in my local fish store he was very active. I also got a blue-legged hermit crab who was also very active and happy with his tank mates. I also got 4 snails. The hermit crab and conch when I added them to my tank didn't move at all I thought it might be stuck even though I had introduced them properly. So I waited for three hours but they still haven't moved. All there other tank mates are fine my corals are all open. Do you know what happened if so please explain!