[tang daddy]

did you say copper? isn't it a reef? if you pull the fish out to copper them it usually takes 4 days I know believe me you have to let them go for a week in quarintine in a reef it's much more difficult but I've only experienced the problem in my fowler with the reef garlic plus but with the fowler I recomend ionized copper that kills the ich in 3 days I leave it in for up to 2 weeks just to make sure, reason why the fish are breathing so hard is because the ich gets into the fishes gills and in 4-5 days can suffocate the fish. The ionized copper works wonders the recent strain of ich is terrible and very hardy however if you don't have any corals or can catch the fish put them in quarantine use full recomended dose 1st day half 2nd and 1/3 the 3rd day let it sit to make sure also it will not completly kill the lr mine grew back coraline after 1 month try a uv sterilizer aswell hope this was helpfull and sorry to hear about your fish I know how it feels to lose all your stock in 1 week.