I've had my emperor angel now for approx. 2 years. I got him when he was a young juvenile. He is now getting the white in his face and his top fin. His back fin is also showing yellow. Does anyone know how long it takes for one to change from their juvenile state to adult colors? He's about 6" long now but I don't see and changes in his body color. I've not had any luck finding this on any web site to how long this should take. I know it would be an approximation but any idea would be helpful. Thanks,

Angie