Yellow tang not doing well

[edolan]

I have a small yellow tang that I acquired about 6 weeks ago. I ran him through ttm and then kept him in quarantine for about 2 weeks and did a prazipro treatment. He has been happily in the 80 gallon display for the last 2 weeks eating well and grazing.

This morning I noticed he wasn't swimming about the tank which he normally does and was staying hidden. A couple hours later I noticed him on his side. I have put him in quarantine. I am no expert but I can't see anything visibly wrong.

I also have two clownfish, a chromis, a clown goby and a watchman goby all of which seem to be fine and healthy.

Ammonia and nitrite are 0 and nitrate is about 5.

My question is if I should treat him. I have some furan-2 and also some api general cure. Not knowing what is wrong I imagine this may not help but could it hurt?

 

[Dmorty217]

I wouldn't treat with anything being the fish is already in a weakened state. I personally have never had a fish lay on its side and recover.

 

[ROB2005]

Usually from what ive been informed, tangs do well in tanks of 150 or greater (they like to have room to swim around) however i would just keep an eye on him and see what happens.

 

[edolan]

Unfortunately he died during the night. Really wierd how quick it came on. All my other fish are still doing great. Wish I had some idea what it was.

 

[Dmorty217]

In the future you should QT fish for 4-6 weeks minimum, closer to 8 is better. 2 weeks is barely long enough to do two prazi treatments, and it can take up to 30 days for ich to show itself