Blaha Posted December 22, 2021 Share Posted December 22, 2021 Hello, So I'm having an issue I don't understand. I have a 29G tank with as of now, 3 neons, 6 black neons, 3 emerald Cory's, 6 kuhlis, 2 hillstream, and a mystery snail. There were 7 neons, but I lost 3 a while ago and one today. The other neons, and the other fish seem fine, but one of the black neons is having some swimming trouble and a few of them almost seem to be turning brown, a similar shade of brown as diatom algae. It mostly seems to be around the dorsal fin or between that and the tail. I did add fish recently, about 4 days ago. Those being the mystery snail, the 3rd Cory, and a 3rd hillstream that suddenly died later that night, with no signs of problems. When I added the fish I did a half dose of the trio(bacterial, general, parasite) Is the brown a coincidence or a bad sign that my tetras are doing bad. Tank parameters: 25-50 nitrates (finally lowering from a constant struggle) 0 nitrites, 300 hardness, 0-40 buffer, 0 chlorine and ammonia, 7.0-7.2 ph, 72-75 degrees. Link to comment Share on other sites More sharing options...
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