There are internal flukes that can take months to finally kill a fish. A new fish, stressed out having gone through the system, may succumb to flukes in days or weeks.
Be sure the fish are given the best foods. Read through the Fish Health Rough Proper Nutrition post when you can.
Tough set of circumstances. I'm very sorry for what appears to be the loss. I can only say what I would do in this case: Catch all fish; give a Rally Pro dip (as described above) and put fish in a bare bottom hospital tank (new saltwater (same pH, salinity, and temp) that has aged) for further observation. Have the display tank go fallow for at least 6 weeks.
Be sure the fish are given the best foods. Read through the Fish Health Rough Proper Nutrition post when you can.
Tough set of circumstances. I'm very sorry for what appears to be the loss. I can only say what I would do in this case: Catch all fish; give a Rally Pro dip (as described above) and put fish in a bare bottom hospital tank (new saltwater (same pH, salinity, and temp) that has aged) for further observation. Have the display tank go fallow for at least 6 weeks.