Can anyone help me identify this disease/possible treatment? This fish has been deteriorating slowly for about 2-3 months now. Early on, the area around the dorsal fin began to lose color and look pale, now the scales there are entirely gone. Before it looked this severe, I treated for 5 days with ich-x and then a course of paracleanse. After no improvement, I treated for 5 days with salt, then another 5 at an increased level. Today I finished a course of Maracyn, but it continues to look worse every couple of days. No other fish in the quarantine are showing symptoms. Water temp has been between 71-78 over these months. ph-8, kh-5, ammonia-0, nitrite-0, nitrate 5-10 as of this morning.
