I had a lovely purple tang in QT and i was nearing the end I finished copper and started on deworming/fluke towards the end of the copper he took a turn for the worst had a pinched stomach and was just spending most of his time lying on the bottom sideways only swimming for 10 minutes every so often before he ran out of energy and sunk to the bottom again i know he had flukes before i did 2 FW dips over the 30day copper so was eager to get the fluke meds in i think it was flukes that killed him but cant be too sure as i know the QT process wasn't stressless it was my first QT and i left it too long so check at times was just weird how he seemed to pickup slowly then when i added the fluke meds bang gone same night or was it the pinched stomach that ended him because pack of energy? Personally think its a mixture of everything that just took its tole but it would be good to pinpoint something


