I haven't done this before. I've heard that too much ammonia can be detrimental to the bacteria colony (or encourage different kinds of bacteria to develop instead). Is the same true of nitrite? Today I saw the first measurable drop in ammonia (5 days in using filter media from an established tank), and the nitrite is off the chart. Should I be changing water to get a level I can read, or is this a case of the more the better?