I’ve had an Emperor Angel for about 4 months now. Bought him when he was the size of a silver dollar. He is doing great!! His dorsal area is turning yellow, his lines are changing, and his tail is turning yellow too. He’s close to 4” in diameter now. But one thing is wrong....that dang hole in head disease!!! I’ve tried everything from keeping seaweed in tank 24/7, kanaflex and metroplex. Numerous vitamin supplements and special angel fish food soak! Open to ANY suggestions and positive experiences.