I'm setting up a quarantine tank mostly for new fish as I've never had one, but thanks to the $1/gal sale, I do now!!! Medication, heater, filter, etc., should be here this week. Medications I will have are Prazipro, Cupramine, Melafix, and Primafix. My question is about my panther grouper that I hope makes it til then. He hasn't eaten in at least a month easily, and is definitely too skinny, swimming slow, and fins seems to be slowly deteriorating. No notable spots on him that I have seen. I'm hoping it's not too late, but any advice, and which medication(s) would be the best start?