I went to feed my fish and the one that had been hiding all day was dead. No, he didn't eat all day. I don't think he ever moved from that spot. I have a few platys, a few zebra danios and few more tiger barbs. All the fish are active and eating. The tiger barbs aren't bothering any of the other fish except for two the barbs that chase one another around. All of the fish are pretty new, I've only had them for a few days. Maybe it was just stress.