Hi I'm new here and I'm hoping someone can help me out because I'm a bit lost. I have a 20 gallon that I have been cycling with fish for about 5 weeks now. Ammonia levels have been steadily between 1.0 and 2.0 ppm the entire time. Last Tuesday I finally got my first NitrIte reading of .25. Still 0 for Nitrates. Now a couple of days ago the ammonia is still at about 1.0-2.0 and the Nitrite has suddenly gone back to 0. Still 0 for Nitrates. Oddly my pH dropped all the way to 6.0 and despite putting in pH increaser, it goes back to extremely acidic the next day. I've been using Prime as we have ammonia present in the tap water. No plants, Aqueon filter, heater set to 75, 2 one-inch comet goldfish and 2 paradise fish. My question is: why did I get a Nitrite reading and now it's back at zero? I'm really confused and I'm hoping someone can tell me if I'm doing something wrong, thanks!