I have had this gourami for a couple of weeks now and it has been doing great. The last couple of days he has been acting a more sluggish than normal but today when I came home today it looks like one of his gills are missing. You can see flesh. The only thing in the tank w/ him is neon and rummy nose tetras and they don't go near him. Now he can't even stay up or swim. He just lays there and he looks close to death. I took him out and and tried to take a picture but they won't come out. Any ideas. It like his gill fell off overnight. It sucks. Please help. I don't all my other fish to die as well.