Hi Beth,
No heavy breathing or darting. I have also looked at the pics in the Diseased Fish thread and it seems to be a false alarm. I am just being safer than sorry. I thought I noticed her swimming with that "slouch", tail down head up, but I guess I have just never before noticed her swimming that way. She definately does not show any signs of heavy breathing or darting. In the pics there also seems to be a discoloration or white slime/glaze on the fish and she definately does not have any of that. She enjoys wiggling in her BTA and she still eating healthy. Thanks for the precautionary heads up!