What does my Dussumieri have?

[Aquarist76]

So I got this awesome Australian Duss tang from LA (non-DD) about a month ago. Was doing great for 2wks. Had it in my quarantine tank and was feeding Focus-Metroplex-Kanaplex food prophylactically. I then put a LADD Golden Rhomboid Wrasse in the same QT. It never looked good and died after 4-5days. Since it got sick then my Duss got sick looking like this. Like I said I was feeding it the medicated food already. I thought maybe black Ich so I dosed Prazipro. After 48hrs it looked way worse so I stopped, did a water change, and started Furan 2 thinking maybe it was bacterial. I've now done the recommended 4 doses of Furan 2 and it still looks the same. I'm not sure where to go from here. I'm still feeding the medicated food daily as well through all of this. He's still eating like a champ and very active.

 

[Aquarist76]

Also, when I first got it I did a Paraguard bath and fresh water dip before putting it in the QT, as I do with all my new fish arrivals.

 

[justmee]

Looks like black ich to me...

 

[Aquarist76]

Looks like black ich to me...

That's what I thought. Not sure why it got worse on Prazipro. Guess I'll try that again though. Any other good black Ich treatments? I've read formalin but don't know what has formalin in it.

 

[justmee]

That's what I thought. Not sure why it got worse on Prazipro. Guess I'll try that again though. Any other good black Ich treatments? I've read formalin but don't know what has formalin in it.

Sorry, I'm not sure how to cure black ich. I did a search and found the following thread, I read through some of the thread and looks like it has some good info:

https://www.reef2reef.com/threads/black-ich-question.468369/#post-5201713

Goodluck!!

 

[Aquarist76]

Sorry, I'm not sure how to cure black ich. I did a search and found the following thread, I read through some of the thread and looks like it has some good info:

https://www.reef2reef.com/threads/black-ich-question.468369/#post-5201713

Goodluck!!

Thanks

 

[Big G]

Black Ich can be ID by using a magnifying glass and look for small black worms with forked tails.

I'm seeing white spots on the fish. Those marks could be from Ich or Velvet parasites after they drop off the wounds often leave marks that vary a bit depending on the color of the fish for you to see.

Velvet usually works pretty fast and sounds about right for your time frame from when the wrasse was introduced in the QT. It doesn't always kill quickly depending on the numbers of the parasite and if the fish has a pretty strong immune system. But with each new generation the numbers of the parasites increase greatly in a tank and will eventually over take the host fish.

The treatment for Ich and Velvet is the same, but you need to consider ramping up the copper much quicker to take out the new generation of free swimming parasites that are looking for a fish host to feed upon.

Velvet treatment:
First step is to do a freshwater dip to remove some of the parasites from the gills to help the fish breathe easier.

Then immediately following a 90 minute bath in an acriflavine product like Ruby Reef Rally. 1 teaspoon for each gallon of bath water. Aerate and heat the bath. Humblefish has found that this step GREATLY INCREASES THE SURVIVAL RATE.

Pre treat the QT with copper to 1.00ppm; or dose CP if you have it. Ramp up the copper within 24-48 hours doing several small doses spread out during the day/evening rather than just large doses. Therapeutic level of copper that is the sweet spot is 1.75 ppm. Keep the fish in the copper for at least 14 days and then can transfer to a clean QT. If the fish is doing well consider keeping it in the QT at therapeutic for the full 30 days.

 

[HotRocks]

That looks like velvet to me. I don't think it's black ich. Those dark spots are the mark that's left from the entrance wound.

I'd recommend treating with copper or CP.