Catastrophe! What to do next?

captained

Member
About a week after moving my fish to a new tank, I lost most of them suddenly in the last 2 days- both clowns, a pseudochromis, flame angel, and now the foxface looks terminal.
Not sure what the disease is- looks a little like bad Ick, but they all got cloudy eyes and dropped within 36 hours of the first symptom. I moved them to Q-tank and started M2 and greenex as soon as I saw symptoms. I also treated the main tank with greenex (have lots of shrimp, crabs and other inverts in there).
Interestingly, my greenbird wrasse and the coral catfish all seem fine (still in main tank. The cats seem to rub their heads in the sand a lot, but they have always done that.
Question: Should I put the wrasse and cats in Q-tank and treat them, or leave them where they are if no symptoms, or maybe that will just stress them? And, of course, how long to wait after no new outbreaks before I start replacing my fishes? 21 days? Is there any advantage to moving the remaining fish to Q tank and letting the main one sit with just the inverts for a while?
BTW, all readings are near perfect- 0 amonia, 0 nitrites, ph 8.3, etc. Even O2 levels are good. There was no cycle switching up to a new tank (moved all the LS and LR from old to new), but I guess the stress made them vulnerable?
Thanks!
 
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