I am not sure you saw my original post regarding your problem with your Emp., so since it has moved to the correct section, here it is.
By the way, if the fish is in need of medical intervention, it would be extremely important to post a clear, up close picture so someone on here can ascertain the best medicine / treatment. Until then you could do more damage than help by treating with the wrong medicine. I offered advice regarding a broad spectrum antibiotic if my suggestions regarding nutrition did not work, however in retrospect, I would rather someone see a picture, and make a recommendation. Some treatments regarding either gram positive, or gram negative treatments, and sometimes if vague diagnosis, then a broad spectrum would be in order. Following is / was my post:
timjoemak:
If you can see flesh, that is definitely NOT good. How big was the Sohal compared to the Emp. For this combination to work the Emp. would typically need to be much larger than the tang when the tang is introduced.
You mentioned NLS Thera pellet food. Is there anything else you feed the angel? Angels in general have a very unique diet, and although NLS is a very good food (I use it myself), my belief is it is not enough for an angel. It claims to have everything in it, but at what ratios to be effective, is what I would be concerned with here. We are assuming this is from agression, and it looks like that is the probable cause, but since you never saw any overt aggression during the day, there is the possibility that it never in fact came from the tang.
Here is just "my observation" from keep a single Emp. for over 10 years with large tangs. Aggression from tangs are typically done during daylight hours. They are not predatory fish that would go on a killing spree at night, i.e. triggers, etc. If you see significant damage to your angel, it would seem to me that since tangs are doing nothing but swimming all day, you would have see signs of that during the day (surely they crossed paths many times during the day). My experience is that tangs will move about some at night, but they typically hunker down, and aggression is not seen at night. Only exception here would be if where the Sohal wanted to "hunker down" is the same place the Emp. wanted, then all bets are off. Just my opinion.
Back to what to do: There are several additives I would employ fast. I would add a vitamin C supplement directly to the NLS pellet, actually add all of your additives to the pellets, they soak them in and your fish will get it in there system, rather than get washed away when they hit your tank. For this purpose, I do really like the NLS pellet.
In addition, Brightwell makes an additive just for large angels. It is called "AngeLixir", it is supposed to have the same free form amino acids found in the sponge that these fish consume in the wild. Also mix in some mysis soaked in Selcon, and if you are not already, add some mix of brown, red, and green algae sheets (you can find these already containing garlic). Since I started using the vitamin C supplement, and the AngeLixir, I can honestly say I have seen some better coloration, which IMO is always an indication of good health. I also add some high quality Spirulina flake into the mix.
If you see the exposed flesh begin to exhibit a "cotton-ish" appearance, then an infection (either fungal / or bacterial) has started, and I would suggest then a broad spectrum antibiotic (keep in mind, I am not a fish vet., just someone who has had a large tank for 15 years). I do believe that pristine water, as well as boosting nutrition is key here. I certainly agree with michealprater -- let him stuff himself, and combat the extra "food" with more WC.
Best of luck!
SV
Thank you,
