Join Date: Mar 2014
Location: South East England
Many thanks for all your replies.
I'd very much like to know to what extent chloride, for example, interferes with hobby-grade nitrate test kits. Jeffww, you are fortunate to have a Hach nitrate test kit. It must use quite different chemistry to the API kit. Do you know how well it copes with any chloride being present in the test water? Or other anions, for that matter? It would be pretty straightforward to devise an experiment to check this out.
"When you can measure what you are speaking about, and express it in numbers, you know something about it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts advanced to the stage of science." ― Lord Kelvin