How to get my baby yellow tang to eat and whats wrond with its fin

[big man]

How it the tang doing now?

He's doing fantastic. He's eating like a pig and I added him to my dt and his fins rapidly healed back to the way they were

 

[SlugSnorter]

I just got new a biota yellow tang in my 10 gallon quarantine tank and he doesn't want to eat anything. When I put a pellet in their he went for it but it was too big so he didn't eat it then I tried again with smaller ones and he didnt even care. I also tried flakes and frozen shrimp but he didn't seem intrested. He's been in quarantine for 3 days. Also I've noticed he has friends rot but a white string thing is on the rotting fin. So is that a paradise or just the rotting of the fin
Here's what the fin looks like


Update I fed him some flakes and he's slowly eating them but I still don't know what's wrong with his fin

tangs do not always eat flakes. try nori clips

What are your tank params?

if both have fin rot there is very likely something wrong with your tank,

how often do you do WCs and are they with tap or RODI water.

is this tank cycled?

 

[big man]

tangs do not always eat flakes. try nori clips

What are your tank params?

if both have fin rot there is very likely something wrong with your tank,

how often do you do WCs and are they with tap or RODI water.

is this tank cycled?

Three weeks ago he was like that. But now he's doing amazing in my main tank