Hi. I have a tank with 2 angelfish. I have had them for a couple of years. 1 has recently become sickly. Today I noticed a red tint to it's fin tips, a white growth on it's tail (pinhead), a scratch on it's eye and an injured/white fuzz on it's pectoral fin. I don't believe it is being picked on by the other. Checked the levels - ammonia and nitrite 0. Ph was a bit high but brought it back to 7.2. Any suggestions?