my tank is now cycling for over 5 weeks now. the ammonia has gone up and down, and has stayed down for the last week. The nitrite is up and hasn't gone down, while my nitrate has gone from 0 ppm to 20 ppm and back to 0 ppm. Is this normal for the nitrite to stay up and have the nitrate go up and back down? I have the api saltwater test kit. Could it be because of inaccuracy testing? I have used a dead shrimp method to cycle the tank, with dry rock... Any ideas....