"Place the animal in a salt bath for about 10 minutes once or twice a day. A salt bath is prepared using 2-3 teaspoons of salt (table salt, cooking salt, or iodized salt, but not "low" or "low-sodium" salt) per litre/two pints. Don't leave the Axolotl in the salt bath for more than 15 minutes each time, because the salt will start to damage the Axolotl's skin and particularly its gills. Of course, this is all useless if the animal is still under stress when put back in its aquarium (strong-flowing water, high water temperature, bad water quality, etc....)." That's from the health article regarding salt baths, I would definitely like a second opinion from someone else regarding this condition. Is this caused by a fungus or white growth? I can't really tell in the photo. If you know your nitrate, nitrite levels that would also help.
