Koran angels

[honda350rmx]

I have had a koran angel for a few years now. it is about 6-7in. i am wondering when it should start to change color. it still has the black and blue. hol long do they live in a tank.

 

[tcmfish]

Large angels can live 20 years plus. It should start to change soon. It may need bigger than a 125 gallon though to grow much more.

 

[HOBrien]

Do they not transition very fast?