I have a couple of new questions on the Nitrification process. As I have stated before I am new to chemistry. 1. Does the API Freshwater Test Kit measure free or combined Nitrates? When the test indicates 0 nitrates, is this a good thing, or does it indicate that we no longer have adequete nitrates to support the plant load, or is that part of the unknowns re combined ions. 2. I have encountered…