Pls help = what's this?

[davechee]

Hi Guys,

Need some help here. Not sure what my fish are suffering from. I introduced them into my tank a week ago, and they seemed to be eating well for the first few days. Then lately they've 'disappeared'. So I took out all the rocks and found these two.

My YT seems to have had it's tailed nipped quite badly, but there's also these brown patches on it's body. My unicorn tang has these patches which look like sores on both sides. It can't swim properly now, just lying on it's side.

Would appreciate your advice.

Thanks

[davechee]

My other tang. This one I fear is in big trouble...

[stabilo]

What are your water parameters?

[flying carpet]

What other livestock do you have in your tank? Tank size and yes water parameter? Any quarantine tank?

[Kelmen]

JMO: Looks to me like external fungus problem.