I have a 10 gallon freshwater tank that has been up and running for a month. No fish, just feeding it a pinch of flakes every other day. Ammonia is 0 and nitrites are holding steady at 2.0-5.0 ppm for the past 3 days. Nitrates are slowwwwwly rising and have finally made it to 5.0 ppm. Temp 79...