Ich strategy review and advice

[snorvich]

While you wait you should start up a qt tank, once up and running treat the fish with copper and let the dt tank go fish less for 72 days. Then you won't have to keep hoping and have a sensitive tank. I'm 5 days into copper... fish go back to dt on Nov 10th. Any fish I purchase moving forward will go into a qt copper treatment then prazipro then 2-3 weeks for observation then to dt. Rather treat one fish then have 4 fish in a qt.

For ongoing consider tank transfer as a way of eliminating ich from the equation. However, you definitely want 5 total weeks of quarantine as a minimum.