My Naso Tang turned all brown in 1 day! What happened?

[TonyOrlando]

I have had my Naso Tang for over 8 months now and he has done great. I just noticed today that his color has completely changed. He his a dark brown color all over and his eyes seem to be darker as well with a lil hazey look over them. Sorry i don;t have any pics. I just fed him and he is eating great and his behavior is no different. Can someone help me out with what happened.

[TonyOrlando]

no thoughts anyone?

[InLimbo87]

Any new additions that could've brought in diseases of any sorts? Anyone seemingly stressing him out? How are your water parameters?

Is he in the setup listed in your signature? If so, that tank is way too small for him, and he could just be getting stressed by the lack of space as he's growing out of the tank.