Hmmmm... where have I heard this before...? It sounds so familiar....
Oh yeah,
THAT's the reason I had to go buy a 55g stand to setup an emergency hospital tank and spend all night removing 400+lbs of rock/corals and capturing all my fish a couple of days ago.
My downfall was also a Powder Blue Tang... which according to Pat over at Amazing Reef Life is one of the species of fish that Julian Sprung wishes was never taken from the ocean.
My tang was nice and healthy, eating well, and not shy at all in quarantine.
A truly beautiful fish.
Within a week of introduction into the big community tank he became covered from stem to stern with the heaviest Ich infestation I've ever seen.
Tried treating the tank with all the herbal and organic remedies to no avail.
A couple of days later he went carpet surfing and the wife was a couple of minutes too late to save him.
Next day I start to notice some Ich on a wrasse, fungus on a clown's tail, popeye on another clown, and cloudy eyes on a Bullet goby.
One sick fish and now I have a pandemic (tankdemic? aquademic?) on my hands.
Now everybody is in a little 55 getting the maracyn treatment before hyposalinity, and this time I'm actually going thru with the full Jeff and Christy 2 month fallow recommendation.
I only have myself to blame.
That tank had an outbreak of Ich over a year ago, and I just treated it with Ich Attack and garlic.
The Ich "went away" and everybody looked happy and healthy for the next year until Mr. Blue came along to get the party started.
I think I've learned my lesson.
If I had done this the right way (fallow) the first time, then I would probably still have a nice happy tank and all my fish right now.
Good luck, Husky.