Like I said before, I don't know what it could have been. Could have been one of a number of things. Don't worry too much, it might have just been a freak thing.
Alright, I need to stop obsessing! EEK. Anyway, I will just have to hope for the best. If everything fails I might do that "fishless cycle" or else I'll just stick to my goldfish. They are so easy to deal with. *sigh* I wanted danios so much tho