I have a rose barb that is sick. I know its not a "monster fish" but I have had this fish for a long time. Rosey is sick. She is missing scales on her side and her tail is all chewed up and where she used to be a goldish copperish color with bright pink fins, now she is a brownish green color, including her fins. She has not ate in 2 days. I took her out of the tank but what do I do? I dont want her to die!