If I'm remembering your intro thread, you just put in a few new fish at once. Was kind of right on the borderline of going too fast, too furious. My guess is that the tank is struggling to adapt to the bio-load. It will though.It’s just weird because I had 0 nitrites and nitrates for over a month. Those nitrites just popped up within the last couple days. Maybe I’m overfeeding? I do have a pair of clowns, a flame angel and a fire fish in my tank