When you say you acclimated him by "over 45 min of bag floating" - were you adding small amounts of tank water to his bag during this time, or just letting the temps equalize? It's important to slowly add water from your tank to the bag, so he can adjust to your water chemistry. (Personally, when I get a new fish, I acclimate for several hours, but I tend to be paranoid.
"Fish TB" is a form of Mycobacterial infection. It can survive for long periods of time, even on dry surfaces, as the bacteria has a waxy coating that protects it. It can even live in distilled water for a long time. However, it doesn't survive on dry, clean surfaces indefinitely....
- How long was the tank empty?
- Was there ANY water in the tank during this time, or was it completely dry?
- Is the same filter in it now? If not, how did you clean the filter? Was it left wet, or dried completely?
- Other than hot water and Epsom salt, did you use anything else to clean the tank?
Hemorrhagic septicemia can be either viral or bacterial.
Here is a picture of a fish suffering from the viral form:
There are additional pictures of the viral form here
The bacterial form is caused by several different types of Aeromonas
bacteria. I'll look for a picture of this, but in the meantime, here's some information: http://ag.ansc.purdue.edu/courses/aq...s/bacteria.htm
Edited to add pictures and info for bacterial septicemia:
More information at: http://www.americanaquariumproducts....aeromonas.html