He still seems active and healthier than I would have guessed. If not cured and still not eating, would a combined treatment help? Also, he might be tempted to eat feeders if they annoy him. I've got some in a quarantine tank that I was going to release into one of my koi ponds. They'd very likely be disease free....I've avoided cross contamination by having seperate nets and buckets, etc for all of my tanks. All of my other fishes, including four other flowerhorns and one midas are doing very well. I don't think that killing the sick fish is yet necessary. I'd like to keep trying until he is cured or becomes too weak.