Velvet

[Doug]

Upon closer examination and some reading, it appears the disease my fish had or have was velvet. That would explain why my mandarin died also.

How the heck does it occur when no new fish added?
Can it be caused by stress from whatever was irritating my corals to extinction?
I have a couple fish in my display like my bangaii, that seem resistant. How do I get it out of my show tank without a period of no fish?

Lastly...