If it was *me*, I'd catch and quarantine all of the fish. FW dip for flukes, and treat the quarantine tank with Hikari Ich-X, which is a formalin-based medicine that addresses ich, and protozoan infestations.
I'd leave the display fishless for at least 4 weeks to attempt to break the life cycle of the ich (and flukes).
That's your best chance to get rid of it, in my opinion and experience.
How long did you quarantine your fish? Usually if something is brewing an infection or infestation it will show up within a fairly short time, then it can be dealt with in the quarantine situation.
Of course nothing is 100% all the time, but it sounds like you've got serious stuff going on in there. Stress, aggression and such usually lead to outbreaks.
Jenn
I'd leave the display fishless for at least 4 weeks to attempt to break the life cycle of the ich (and flukes).
That's your best chance to get rid of it, in my opinion and experience.
How long did you quarantine your fish? Usually if something is brewing an infection or infestation it will show up within a fairly short time, then it can be dealt with in the quarantine situation.
Of course nothing is 100% all the time, but it sounds like you've got serious stuff going on in there. Stress, aggression and such usually lead to outbreaks.
Jenn