Hitler died March 28th:'( I don't know why. I fed him everyday I was here and my mom fed him when I was gone. He did form black marks but it wasn't getting bad or anything. I thought he was just changing colors. I cleaned his tank and he had the right filter but he still died. He was 5 years old when he died. May he swim strong and rule aquarium heaven✋ Edit: Time of death March 28th 2016