Get all so real quick GE was in a 20 g with a pair of clowns a cleaner shrimp and a firefish. Have had the peppermint maybe three weeks. A week ago he got pale then he went to very dark for a few days. All other fish and coral ok. DOA this morning when I turned the light on. Is there a chance I was sold the other "peppermint" that is only a coldwater shrimp? I've seen him eat but I had the cleaner shrimp first maybe bullied? I didn't notice they usually where on diff sides