minnows

My fish (minnows) just stare at the background all day. Only move around during feeding time. Mostly they just stay in the back staring. Any suggestions or reason for this?

I have a small tank that had 3 white cloud minnows. About a week after an algae outbreak I lost one of the little guys, and the other two seemed a bit offish for about 2 weeks, when one of them got dropsy. I moved it to a quarantine tank, where it has been for 1 week. I have been treated it with...