Well, I have used this forum for my sister, and now I have a personal problem! We transferred a bunch of seeded media from our 55g into the canister filters for our 220g, and we also added a heavily seeded sponge filter. At the same time, we introduced 13 gold barbs. After seven days of testing, I have 0 readings for ammonia, nitrites, and nitrates. I would assume that we should have had at least something for nitrates? We have since added 12 denison barbs, along with some bottled bacteria. After four days of testing, we are getting the same results. Anyone know what is going on here? Are we in for another full cycle?