Black ick

[Irishman]

So let's start off by saying that this isn't my fish or set up at all! I was wondering if this yellow tang has black ick or is that even a thing? I remember on another forum that someone mentioned it but can't really recall. A few yellows I saw had these black spots on them and were really malnourished.

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[rmougey]

Black Spot disease isn't like Ich that many of us think about, instead it's a flatworm (trematode) infestation. The difficult piece is that elimination in the tank is difficult as these parasites can live for several weeks without a host. Suggested treatments include:
- Fresh water dip
- Formalin (Paraguard) as a dip or for use in the tank
- PraziPro as a dip or use in a tank

As one would expect, when treating a fish in a reef (or invert) tank it's best to use a hospital tank for the effected fish; treating the tank with inverts is not suggested. If you are dealing with a fish only tank, then dosing the display is acceptable.

If your plan is to leave the tank fallow, plan on a 10-12 week window before reintroducing fish.

 

[Irishman]

Good to know. These were at a LFS


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[jda123]

There isn't anybody who want to hear this, but the chances are not that good for the fish that is so malnourished. That looks like a fish that is only fed nori or is not fed at all - of course, neither is good for tangs. Sorry.

Most healthy fish can fight off the flatworm, but it can still exist in the tank. This one probably won't. I would stay away...

 

[Irishman]

I'm definitely not going to get fish from them. Just was curious if my questioning was right about "black ick"


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