I am doing a fishless cycle in a 20g tall, current readings are amm 0, Nitrite 2.0 (ish hard to tell purples), and Nitrate 10. I am adding ~4 drops of ammonia every night and I am still testing at zero. My Nitrites do not seem to be budging, is my cycle stuck? Am I not adding ammonia often enough? Cycle has been going for about 3 weeks now. I do have two plants in the tank and a large piece of driftwood if that makes any difference. When I do add the ammonia nightly I can get it up to about 1.