My tank had an ich outbreak and was fallowed for 80 days while the fishes went through copper treatment foe 45d follow by 45 days observation in holding tanks. The fishes had been reintroduced for 45 days now and show no sign of disease. Should I wait for few more weeks before celebrating or can I declare safe and begin to quarantine more fishes. Currently I have 15 tangs and 3 fox faces including 3 hippo tangs, achilles, powder blue and a powder brown.