Hello, all. I apologize if this isn't the correct place to post this, but I couldn't find a specific place for fish disease, so I figured this was the best place. My tank has been running since early April and this is the first time I've dealt with fish disease, so I'm not sure what I should do. I just noticed some white spots on the head and face of a couple of my Serpae Tetras. Along with the white, the spots also look pretty "raw"/less shiny than the rest of the fish. The fins are also looking very torn/shortened. At first, I thought this was ich, but some research made me think columnaris is a better guess. All other fish in the tank look fine, and all fish, even the obviously infected ones are acting fine so far. I want to try to get this under control before it spreads, if possible. The most recent addition to my tank was a Blood Parrot, added a week and a half ago, which appears to be quite healthy at this time. No deaths yet, other than a mysterious Bolivian Ram death last weekend. Although I'm unsure of what killed the Ram, I saw no signs of disease. I don't think I'll have any luck getting an accurate picture, but I'll try. I'll also do a water test, but I wanted to get this thread going as soon as possible to begin to get some thoughts. However, my last water test, after the Ram's death, the water looked good. So, unless I'm missing something, I don't believe this is a water quality issue. Please advise me on what actions I could take. Thank you!