My orandas wen started to come off and im assuming its because my other orandas started to eat it. Its crazy because I checked on them at 9am and everything was fine but I came back at noon and his wen was gone! I moved him into an isolated 10 gallon tank and have been treating with primafix and melafix. At first it looked white like it was just scar tissue but now its starting to turn black... im concerned that its becoming infected. I was hoping someone could help me out and tell me if the black is a normal part of the healing process or if its an infection. I attached a picture showing when I first saw it which is when it was still white, and another picture from 4 days later when it started to turn black. Thanks in advance!