Long story short. I bought a scopas tang from my lfs that I trusted and added it to DT without QT. Next day it had ick spots I moved all fish to QT tank and started coppersafe on Sunday. Yesterday the tang was dead when I got home I did a water change and dosed coppersafe again this morning my sixline wrasse was dead. No other fish have shown any signs of being sick. Tested copper level with an API liquid kit which is all I have and it tested 1.0 so I added one more dose which brought it up to 2.0. Did I do the right thing? I really don't want to lose more fish.