[Peter Finke]

Ryan, first, driftwood from the trade is of no use for a blackwater aquarium. It is very well probable that this wood had a very negative effect in the oxygen-content. But I have never heared before that the need for frequent air-catching had a negative effect on the swim-bladder of the fish.
But second, how are the water values? I think you have measured them from the beginning. How did they develop?
Third, has a temperature chock happened?
Fourth, how couldn’t you say whether your food has been eaten? One sees the fish eating or one does not see them eating. And what sort of food did you feed?
The strange behaviour that you describe points to a serious illness of your fish. Lack of oxygen could be the right track but is not enough to clear this case up. Driftwood from the trade could consume high percentages of the free oxgen, and then even Paros go to the surface an catch for air. Normally they don’t do this with the exception of some bubble nest building.
I suspect a multiple cause. Mostly a severe coldness was part of it when the fish swim the way you decsribe it. And mostly – I am afraid – there is no healing whatsoever.
Write something more about the water you use and the overall conditions. And were the fish completely healthy when you got them or was there some strange behaviour right from the beginning?