Here's my story:
I took 0.25mL of bleach, from what I mentioned is labelled "14 302 19:10 A4 K1", from an eye dropper, added it to 2.5L of water from my dehumidifier and mixed it thoroughly. Then when I tested it, the FC came to 1ppm. The TC was a little hard to tell, because it was a different colour, but it was as least as dark as 3ppm. So what does that mean?