So, I had just bought around 5 ghost shrimp, and within the hour or two they had all died. I didn't catch this till the next morning, and my gourami was poisoned from the overload of ammonia, as will as one neon tetra. I know shrimp are pretty delicate, so maybe I had some ammonia issues, but I've been checking everyday and I've gotten zero ammonia. I don't have a nitrite test kit, but honestly, if I don't have any ammonia problems, having nitrite problems seems unlikely. What do you think the deal is?