Yellow Tang not eating

[daj0424]

I have had my ellow tang for about 5 months now. Ever since I first got him he was a great eater. He eats flakes and frozen brine shimp. In the past week or so I treated him for ich with copper. I noticed that ever since then he has not been eating as good. In fact he only eats a few flakes when I feed. He also eats seaweed that I put in the tank every other day. In the past few days I noticed that his stomach is sunk in. It looks like he has dimples on both sides of his stomach.
Some of the flake food I feed has garlic in it so I am using that. I am just wonerding if there is something I am missing or need to do to get him back to looking full again.

 

[beth]

I'm afraid that diet you are offering is not good for tangs. Tangs need 60% vegetarian food, such as quality sea algaes. Brine has litte to non nutritional value. You need to do a significant change in diet.
Copper as well, is not a good choice for treating tangs. Have you completed the ich treatment? Did you do the treatment in a quarantine tank?

 

[daj0424]

I am sorry for the confusion, I feed Formula II flake for my tang once a day, the second feeding I rotate with Brine Shimp or the garlic flake food that is a mix diet for both carnivors and herbavors.
I used a Qt tank and used seachem copper treatment for 2 weeks. The bottle stated I only use it for 10 days but all the threads I read said use it for a month so I compromised.
I stopped the copper treatment about 3 weeks ago sorry my timming was a bit off in my first post, and thats when I noticed the slower eating behavior.
Any suggestions? Could it possible have something to do with an internal infection?

 

[aquapro_1]

soak his seaweed in selcon. He is mal-nurished. He needs to graze all day. I always have algae for my y-tang to eat. Feeding once/ twice a day is not enough. Is he still bright yellow or pastely?

 

[daj0424]

he is still bright yellow but I have noticed on his dorsal fin he has some orange coloring on it. I am not sure if that would be a bacterial infection or just coloring. If you are far away you cannot even notice it but up close it looks like it takes up half of his fin.
I went home for lunch and feed him and he seems to be eating okay. He just doesnt seem as agressive as he used to. I put about 1x1 inch of seaweed on a clip every other day and he eats that but it is normally gone in about an hour.
Do I need to worry about the orange? It does not seem to be anything other then some discoloration.

 

[aquapro_1]

Give him extra vitamins. Orange? He should always be bright sun shiny yellow. Sounds like he is loosing his coloring. Ever buy frozen seaweed? I usually drop a couple into the tank. It loosens up as it thaws. Can get a little messy, but resembles natural algae. soft & mushy. Try zucchini on a clip & maybe some broccoli. You do know to get them raw & rinse well with ro/di water. Clip it to the side of the tank, close to the ground.

 

[daj0424]

Upon further review and looking at Beth's forum I believe it is a bacterial infection. The pictures are close to what my yellow tang has only the orange spot is on its dorsal fin.
Water quality: FOWLR
ph: 8.2
Nitrites: 0
Nitrates: 80 they have been between 60 and 80 for about 5 months now. Cannot seem to keep them under control.
Since I just ran copper about 3 weeks ago I am not really wanting to run anything again. What are my treatment options?