Hi, I have three acaras from a community tank. Parameters are ammonia 0 nitrites 0 nitrates 10. They are earing and active and bright, no disease process that I can identify on their body. They start darting around the tank and pass quickly, seemingly healthy hours before. The rest of the tank, angels, Cory's, plecos, panda Gara, so far are fine. I did have columnaris in this tank approx three months ago. But have since had zero deaths and thought I was past that. This is presenting differently and more suddenly. Any help?
