Well, I got a nitrate test and I got the results, it looks like it's around 2-5 ppm lmao, I was using a pond test kit, I thought that worked fine for a freshwater aquarium but I guess not lol
You think that if you had 2 bleeding heart tetras that there would have been a blood bath? If so, I highly highly doubt it. They're a peaceful tetra unless you're talking about another fish named bleeding heart something.