I am doing a fish less cycle on my 36 gallon tank that began on aug 19. I tested today and had 0 nitrites and 1.0 ppm ammonia. I had a spike in nitrite over a week ago and it's at 0 now, but I am just wondering why ammonia isn't at 0 yet. I dosed almost 3 days ago to 4.0 ppm. Do I just need to wait a little longer? What steps should I take? Thank you!