I had an ich out break in display tank and after losing two fish and battling for a month trying to do ich management I have thrown in the towel and moved fish to quarantine. Display will be fallow for 76+ days. I have 1 yellow tang 1 powder brown tang and 2 frostbite clowns in a 25 gallon tank. Started yesterday around 5 pm and had copper up to 2.3ppm 10pm. Everyone looks like they are ok and are a little this morning. Clowns are developing a pinkish redness down their spines of their back. Obviously being white is stands out a bit. Is this an issue or normal in quarantine. I have never done this before so new one on me. Any help is greatly appreciated. Ammonia on Red Sea test kit says 1.2 but I know everyone says they aren’t correct with copper In the water. Acting normal, no hard breathing