So I got a sunburst anthias a month ago. I qt in normal water for 1 week then treated with coppersafe, ramping up to 2.3ppm over a weeks time and let him sit in qt for 2.5 weeks. He was 100% fine, eating like a champ, active etc. I then emptied tank, put fresh sw in and dosed with prazipro. He was fine for 2-3 hours then found him laying on side struggling to breath. He was gaping his mouth open like a yawn every few seconds. I lifted and propped him up with my hand near the current to get water flow over gills but I think it was too late and he died. The QT tank has plenty of water movement on surface including 2 airstones, heater, and pvc pipe for hiding. The water temp, ph, and salinity were matched to previous qt water. Is it possible flukes survived coppersafe and effed him up too much once the prazipro hit them?