i have a 48 g and 8 fish in it i just put them in they are all healthy and swiming around jus the day i noticed the nitrite a little high but i got no ammonia
you really want nitrite to be 0, or very close to it. It is just as bad for the fish as the amonia is! Do a water change, wait and test after an hour or so, and if its still high do another water change