I've had a yellow longnose butterfly in QT for 2 weeks now. It pigged out on everything frozen I dropped in the tank from day one. After about 5 or 6 days of observation I started dosing cupramine. Brought it up real slow to .4 mg/L over 3-4 days. Unfortunately now, I haven't seen it eat since cupramine has been therapeutic. I think its been about 5 days since I've seen it eat and I'm thinking I need to change something. Is it time to pull the copper and try to get it eating again? I haven't found a lot of posts with people's experience treating YLN butterflies with copper. Maybe try switching to coppersafe? I could also try TTM, though I've never done it before. Fish looks quite healthy and I don't suspect anything, but after a few bouts with velvet on newcomers I'm super paranoid at putting in anything in the DT without a full run through copper.