Taregreen Posted November 10, 2020 Share Posted November 10, 2020 (edited) S.O.S.! Over the last week my Neon Tetras have been dying off steadily and I can't figure out why. I started with a nice school of about 25 and now I'm down to the last three or four. They're in a 90 gallon planted tank with all community fish, mostly tetras, livebearers, corys, etc. My water parameters have been pretty steady at: PH = 7.9 (I know this is a bit high as they like more acidic water, but see the kicker below) Nitrates = between ~5 ppm Nitrite = 0 Ammonia = 0 Hardness = 140-160 (Moderate Hardness) KH/Buffer = 55-70 (on the low side, but I don't have big swings in PH) Water Temperature 77-78F Here's the kicker! I have a 45 gallon, planted, community tank with pretty much the same water parameters and my Neons are thriving in there. I just can't figure it out. They look healthy, too. No visible signs of disease or fungus or parasites. So frustrating. Any help is appreciated. Oh, and yes, I do regular water changes and use Prime to dechlorinate. Edited November 11, 2020 by Taregreen Link to comment Share on other sites More sharing options...
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