I have two blood parrot fish and I’ve had them for probably seven years. One is not well and he has not been well for almost 2 months. He’s very pale in color, his gills and eyes look swollen, but he keeps hanging in there. We’ve done several water changes over the last couple weeks and he seems to get better or look better after a water change. during his life, he would get black lines along the outer part of his fins and sometimes his mouth would get black, but they would always disappear after a day or two. I thought it might be stress. He has no interest in eating, but he is interested in his surroundings. He hangs out in various places in the tank and seems to like to be near the other fish. Any ideas out there?