Kole Tang, very pale / discoloration

[red_sea_reef]

hi guys

I have my kole tang since a year now , and since 3 weeks he is very pale , with loss of colors.
I try to feed him with a large different food and diet possible
Dr. Bassleer BIOFISH FOOD Green, Aquaforest, garlic , nori ....
unfortunately with no much effects
what can i do ?
thanks

 

[JumboShrimp]

I would turn attention to stress (bullying), diet, and water quality; others might chime in about possible health issues.

 

[EakTheFreak]

hi guys

I have my kole tang since a year now , and since 3 weeks he is very pale , with loss of colors.
I try to feed him with a large different food and diet possible
Dr. Bassleer BIOFISH FOOD Green, Aquaforest, garlic , nori ....
unfortunately with no much effects
what can i do ?
thanks

Have you been dosing NOPOX or any form of carbon dosing within those 3 weeks?