Regal Tang ??

[George]

yes, your DT has marine ich (MI).
I will either re-home the tang (after a successful treatment) or treat all fish in a QT and keep the DT fish-less for 8+ weeks. I prefer the second solution.
There are some study showing that certain strain of MI will loose its effectiveness against fish after 11 generations. But there are more than one strain of MI in the wild and you never know what you have. And you are not sure if all your fish can survive MI throughout this period.
Good luck.

Originally Posted by Madmak

I have a beautiful 4" Regal Tang that developes ich every time he is in my DT. I have had him out for Cupramine treatment 4 times now and everything clears quickly, flashing stops, and he relaxes, 2-3 weeks each time at a proper dose.

No other fish show any signs of ich or flashing at all although the parasite must be in the DT.

I run a 30W, 36"UV with a huge dwell time 24/7 to help with this.

My question is do I try him in the DT again or is this fish better off re-homed?

I don't want to repeatedly QT him but have heard that maybe letting the ich run through a life cycle of two with him in the DT may be the end of it. Let's his slime coat return to normal and increase him immunity levels as well as increase his comfort level.

Looking for any experiences or suggestions as I'm starting to feel for this guy.