I'll start from the beginning. I have a 72g fowlr that I upgraded to 2-1/2 months ago. I've been in the hobby for 4 months now after being given an established 29g. 2 clowns, green chromis and a watchman goby came with the tank and were about 3 years old. I added a yellow chromis, coral beauty, fire shrimp, snails and hermits. In the beginning of February I thought my female clown was showing signs of ich. I didn't have a qt at the time and procrastinated on buying one. The symptoms would show then disappear. After 2 weeks of this she was finally completely covered, breathing fast, barely eating and coming to the surface for air. The male also had a few spots. I didn't think the female had much time left so I bought a qt and moved them immediately. Also in the mix at this point was a sailfin tang that my gf brought home for me 2 days before as a surprise. Right after I moved them all I gave the first dose of cupramine. The next morning the sailfin was covered in spots and died before I got home from work that day. The next day I gave the second dose bringing the copper to .5. Around day 4 or 5 the goby jumped out through the only area not covered by the lid and died. I haven't seen the coral beauty eat since day 4 but is still alive and active so I'm guessing he's picking food off the bottom. I lowered the copper to 0.4 6 days ago after reading that angels don't do well at 0.5. The clowns had looked all better within the first week and the female has been eating like a champ since. By week 2 she started having bumps/white spots again but nothing like before. They are still there now after almost 4 weeks of copper. The other fish look fine. I saw a post by humblefish where he said that copper can mask the symptoms of brooklynella so I'm wondering if that's what I'm dealing with. I have formalin-ms on its way just in case. I posted a pic similar to what the clown looked like before the qt along with a current pic but it's hard to see and the 2 real noticeable spots were on the glass. So if it is brook do I pull the copper and treat the whole qt or just do dips/baths on the clown? I was also planning on a 76 day fallow period so I have plenty of time to do this right. I've been doing tons of research but I need a little first hand advice..