Skin discoloration on emperor

[Shark.Bait]

My quarantine tank seems to be having some problems lately. I've had a emperor angel for a few months. It came in with some white, slightly discolored skin splotches. The whole tank went through 20 ish days of CP, then the tank seam failed and all livestock was moved to a 125 qt. I've decided to go with hypo this time around for QT due to the large amount of windows and ambient light around the tank. I'm slowly lowering the salinity and I noticed the spots have come back. Ich is definitely in the tank, I have noticed it has a hazy eye as well, but very slight. Appetite and overall health has not been affected at all.

I have started prazipro which seemed to not help. Not too sure it was flukes to begin with, but the prazipro is easy to administer and safe. I have never seen ice cause this discoloration though. To me, it seems like a fish version of vitiligo. Other than that, it may be bacterial. Suggestions?

 

[snorvich]

Remember that hypo salinity only treats cryptocaryon irritans (and excludes one strain that is hyposaline resistant) so it is not an effective general quarantine protocol.

 

[Shark.Bait]

would you recommend CP despite the possibility of being in direct sunlight? I can't block all light from the tank.

 

[Shark.Bait]

Any ideas? I've noticed a bit on my naso as well

 

[ThRoewer]

CP would be a good choice if you are not sure what it is exactly. You can always darken the tank a little by covering it on some sides if you are concerned.
Though as I understand it, visible light isn't the issue, but the UV component of the lamp spectrum. UV shouldn't be an issue with ambient light inside a room as the glass of the windows (and the tank) filters most of the UV spectrum.

 

[Shark.Bait]

Awesome, added the cp today, thanks for the reply as usual

 

[Shark.Bait]

Doesn't seem to be working at all. The fish has been in cp for about a week. I'm thinking about trying an antibiotic at this point. CP and prazipro have not had any effect. I'd try a fresh water dip but I rather not stress the fish since he's eating well, and I'm unfamiliar with the protocol. Thoughts?

 

[Deinonych]

I personally would only do freshwater dips in the case of a severe fluke or velvet infection, where the fish's life depended on rapid remediation. If the CP is not having effect, you might try a broad spectrum antibiotic like kanamycin or nitrofurazone to see if that resolves the problem. The fact that the fish is eating well is good.