I bought a bannerfish and powder blue tang and put both in quarantine. I ran that Prazipro for 7 days and both fish were swimming around and eating well. I did a 30% water change and have started Copper (Cupramine). I followed the instructions and dosed half the Cupramine and had a copper level of 0.15 then, 48 hours later, dosed the second half and the copper measured about 0.40. The bannerfish is doing awesome but the tang has decided not to eat AND remains in pretty much one place, i.e. not swimming around. The tang was fine after the first dose of copper but changed his behavior after the second dose. I did a water change again to reduce the copper level and will check that level tonight. I read on page one of this thread that the copper can cause a fish to stop eating while it adjusts. Does that also apply to its swimming habits? The tang color still looks great. Is this normal with the first couple days of copper?