No matter what I do I can't get it under 1.0 . It's aroudn .5-1 Not too clear with comparing to the chart. Nitrate 0 Nitrite 0 Strange huh? I keep the gravel very clean. Every day even twice a day, I take a small siphon and a bucket and suck the poop out. I've been doing frequent water changes once every 1-2 days. NOTHING, Ammonia up the Ying Yang. I have fish in the tank as well.