Skeptical about API Ammonia test kit?
Last month, I bought the master test kit, and the ammonia constantly read out 0.25 ppm. This lead me to constantly change water. However, today, I got fed up with the reading, and decided to test other waters, since I've never seen 0 ppm ammonia ever. I tested it in my remineralized distilled water, and it reads out 0.25 ppm. Ok, it might be contaminated. How about my distilled water I use to top off? It reads 0.25 ppm. Ok, let me open up a brand new water bottle I'll drink from later. It reads 0.25 ppm. Has anyone ever seen 0 ppm for ammonia? During my tank cycling, the ammonia went up to like 0.5 ppm, then a week later the nitrite went up to 2.0 ppm, and then nitrate went up to 20 ppm a week later. Today, the nitrate and nitrite are at 0, but the ammonia is still at that cursed 0.25 ppm, no matter what.
Can I just assume this is just error? (My tank is heavily planted (along with duckweed) with about 20 snails, if this makes a difference)