Here are the readings I got on a 2.5 gallon tank with a plastic plant and a clay pot.
So I looked it up and I'm like umm WTF how? It had been sitting in a test tube for a few days with a tight cap before I tested it. Also, I was not expecting to do another test, so the purple one is half full, but I used half what I needed.
Is this right? Did I test it wrong? What does it mean?