Assuming this is Ich

Coach63

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Received a yellow tang from a guy who is breaking down a tank. Was in my DT for three weeks then noticed white spots everywhere on him. Still swimming great and eating like a cow. Is this ich? I’m putting him back in QT. What do I use to treat? Thanks in advance.

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pdxmonkeyboy

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Yup. Pretty bad case. I would give a fresh water dip and then medicate. BTW.... now your tank will have ich forever unless you go fallow. No, there is NOT a reef safe ich product.

Sorry man.
 

Jay Hemdal

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And I am assuming RODI?
No - dechlorinated tap water for the five minute dip, the same pH as the tank (or close). Weird though - the far away shots sure look like ich, but the closeups seem to large. May just be an artifact of the photo, IDK.

All the fish in the tank have been exposed, and will probably contract it as well. That said, it IS possible that you had ich in your DT that the fish were managing on their own. The YT perhaps hasn't been exposed to ICH, so when it was added to your DT, it got sick. That said, it is commonly the case that when fish are managing ich, the propagule pressure of an active infection in the tank becomes too great and they lose their resistance and get sick as well.

Copper in a QT and letting the tank lay fallow is probably going to be your best course of action.

Jay
 

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