A few days ago, I posted about a Tiger Barb that wasn't swimming right. At first it looked like it was just an injury because it was swimming ok, but favored one side. Yesterday, it seemed better, but now I think it was more learning to swim with the affliction rather than actually healing. But today was much worse. Instead of just favoring one side, the poor thing couldn't even stay up at all. It was sideways or upside down, and only able to wiggle its way across the bottom. It looked to me like some type of swim bladder problem. Since I don't have a quarentine tank and don't want to treat the entire main tank when I don't know the cause, I chose to put down the one sick fish. I was tired of seeing my little friend suffer, and didn't want to risk whatever was causing his problem being contagious. With 12 barbs total, one fewer doesn't look any different unless you count them, but I'll know it's gone. This is one of the fish that's been with me since the beginning, and it will be missed.