Due to the faint ammonia reading I believe I am registering on my Nutrafin liquid ammonia test, I was wondering if it'd be of any use to post photos of a test so I could get other opinions on what I am seeing? It's the Nutrafin liquid ammonia test, so it's a clear test at 0ppm, with colour development hinting at a false positive in some instances, or the presence of ammonia. It does not distinguish between ionised or free ammonia.