I would of quarantined the sick fish instantly but they all came from the same tank and I wanted to be safe so I’ve been treating the whole tank for 2 days with medication.I am so very glad to see the number of people who advocate trying to save the fish. Certainly makes the case for a quarantine / treatment tank. A lot could be learned from treating and saving fish. It's iffy sometimes and the more knowledge among more people the better. Rosario LaCorte was a great proponent of treating and saving fish.