I did that water change I mentioned, and the haze seems to have gone away completely. I also changed out the carbon media at the same time too. So as of now, it's all good.
As for the clown, I don't see him go tot he bathroom often. So I can't tell if it went away or not. I certainly see no different behavior from any of the fish. everyone is swimming and eating like normal.
I will be moving towards the end of the month, so we'll see what kind of stress related sickness that brings up.
