So in my 38 gallon I have been losing my danios. I am down to 7 now. 3 of them I never found any remnants,2 i did find before they got eaten. I am wondering what it could be? I thought they were supposed to be hardy fish. It is a cycled tank,but not running very long. It always holds 11 Peppered Corys. They are fine,havent lost any. As for my parameters, Ammonia=0,Nitrite=0,Nitrate=between 20 and 40 ( hard to tell the color but wasnt higher than that) pH 7.2 didnt do kh/gh. But I do know my tap water is soft and low buffering capacity.
Any ideas? Anything I can do for them? One of them isnt looking too good right now. Sorta curved spine. I noticed that in the others as well(that died). One of them came that way,I just thought it was deformed. I also had a green Glofish,who perished but also never grew very much.
Im thinking NTD? Hoping that over TB. Makes sense if the others perish as well,since several were eaten before I noticed they were dead. Also wondering if it is NTD will that harm my corys at all?