Hello, I got three pajama cardinalfish for my birthday from my daughter but one of them, smallest one, never ate. I tried miss shrimp, brine, flakes, pellets, and emerald green assortment but nothing. I thought maybe one of the other pajamas was bullying it because it would stay in a corner of the tank. I woke up today to find it had passed away. I'm so sad. It didn't show signs of disease or parasites. Does this mean I have to treat the rest of the quartined fish (2 clownfish, 2 pajamas, etc)?


