On 7/8/24 I noticed the scales looked slightly off on the right Flank of the citrinellus butterfly, so I immediately yanked it and moved it to quarantine. It is currently by itself with formalin dosed at 0.9mL/10 gallons once daily, since cupramine is also in there at 0.55mg/L (this fish brought ich and velvet into the display, which is also being treated with copper and thankfully everyone is doing well).
By 7/9/24 the lesion was much larger, but had not broken open. This is classic presentation of Uronema on butterflies, just a few scales out of place, which then becomes a giant open sore in just a couple days, then the fish dies. The other fish become infected when they pick at the sore or the dead body. This picture was taken that day. I talked with the veterinarian I work with, and we decided to try injecting Metronidazole directly into the lesion that evening. The fish was instantly more active, brighter, and eating almost twice as much within 24 hrs.
The injection was repeated 48 hrs later (7/11/24), and the lesion has pretty much completely disappeared. Appetite is back to 100%, scale discoloration and displacement is gone, and fish seems none the worse for wear. I'm going to continue to monitor in quarantine for a few weeks, then hopefully move back to the display once everyone has done 30+ days of quarantine.
Here's a photo I snapped tonight.
And in other news, a local friend of mine who is also interested in obligate corallivores decided to give violetaquarium.com a try, and received pretty nice looking fish. So I decided to give them a try as well, since they had some fish I've been searching for locally for a while and either could not find, or were ridiculously overpriced here. Setting my 75 gallon quarantine back up tomorrow to be ready for them all when they arrive! Hopefully I get them all, especially the butterflies eating well on prepared diets.