When it drops, it drops all of a sudden. I'd say you're very close to being cycled. Once you get a 0 reading on your nitrites, I would add 1-2 ppm once more just to ensure that ammonia and nitrites get back down to 0 in 24 hours.MandyBlue said:Was not able to test yesterday since I was out of town. But my Ammonia is once again 0 and now Nitrite is 1. Should the nitrite go down that fast?