I’ve got a 20g qt set up that currently has a 2-1/2 inch CBB in it, qt day 3. I set the tank up a week ago with a 3 lb piece of cured live rock, HOB filter, Dr Tim’s bacteria, and power head. I’ve done 25% water changes daily, but still have .25 ppm ammonia showing up on my API test. However, zero nitrites. If I had proper bacterial filtering, shouldn’t I have nitrite too at this point? Other than coinuing aggressive water changes, what should I be doing differently?