Hello! I am new to keeping fish, but I have a 29 gal tank, I got it on Dec. 28, 2011 with an albino pleco, an angelfish, 6 cherry barbs, and on this past Wednesday I was super excited to add 6 bleeding heart tetras. I have been testing the water every day since I got the tetras, and it has been consistently .50 ammonia, 0 nitrate, 30 nitrate (.25 ammonia right after water change, but by the next day it's back to .50). I have been changing 30% of the water every day, because my bleeding heart tetras are dying off one by one. I just can't figure out why. All my other fish are doing just fine. Are bleeding hearts super sensitive? In all my reading I read that they are hearty. Did I just get a "bad bunch?" The one thing that is making me sick is I didn't quarantine them first~my 10 gal tank is now in my daughter's room, with three guppies and a honey gourami. I don't have a quarantine tank anymore. I'm praying my angelfish comes out fine. But is there something else I can do to learn why my tetras are dying? One thing I did differently is I tried giving my fish frozen brine shrimp on Friday, then that evening they started dying~2 died Friday, one yesterday, and another swimming on his side right now And I also wonder if my ammonia test is bad (using the API kit) because the tank water and filter actually smell like ammonia. My 10 gal and 5 gal don't (but they are completely cycled, 0 ammonia, 0 nitrite). Is it most likely the ammonia? They are just more sensitive than the others?