Disease identification- fleshy spots on hippo tang

[sik_z33]

Hi all, I am seeking help with disease identification. I've had my 5 year old blue tang in hyposalinity for the past 12 weeks to treat a bad ich outbreak after a tank move. The ich cleared in the first 2 weeks and he and his tank mates were doing great. In the past 2 weeks he's developed these large scaly looking spots, been reclusive, and has decreased appetite. The other tangs in the tank are doing great. Does anyone have any insight into what the problem could be? Thank you

 

[Jekyl]

@Jay Hemdal @vetteguy53081

 

[sik_z33]

He's currently in a 180 display tank in hypo, I have a smaller 10 g qt tank that I can transfer him to treat, he's been alive too long for it to be velvet, could this be a bacterial?

 

[vetteguy53081]

Are you sure you didnt have velvet at the time? Looks like mucus spores and can be associated with crypto.
What level hypo did you have tank at ?

 

[sik_z33]

I'm pretty sure no velvet haven't purchased any new livestock in years. I have a yellow tang and naso tang in the tank with no health issues.

The tank is at 1.009 ( calibrated refractometer) and is still at that level

 

[Jay Hemdal]

I'm pretty sure no velvet haven't purchased any new livestock in years. I have a yellow tang and naso tang in the tank with no health issues.

The tank is at 1.009 ( calibrated refractometer) and is still at that level

I've seen this before, but never this widespread. I always just attributed it to lesions left from the Cryptocaryon trophonts falling off - possibly bacterial infection...but I don't know for certain.

12 weeks is a very long time to run full hypo. I generally back off to 1.012 35 days after the last spots were seen, or even return to full salinity then. Forty years ago, I worked for a public aquarium that ran hypo long term and we saw some issues, but that was so long ago, I can't recall the details.

Jay

 

[MnFish1]

To me it looks like a potential reaction to the hypo (mucus, etc), and the cryptocaryon. However, much like a burn patient - the extensiveness of that would suggest to me that an antibiotic could be useful - especially given the behavior differences. That looks like considerable 'damage' to me - and if not infected already - will likely become so. @Jay Hemdal?