I bought these
pH strips on Amazon, but I can't figure out how to read them. I thought it would be simple, just dip the strip in, wait for it to dry a little and then match the boxes up with the ones on the container. However, there's four boxes on the strips, and all of them give a different reading. So, my reading is anywhere between 5 and 12.
That's a huge difference.
The comments on Amazon aren't too helpful on figuring out which box to read, and on-line when I google it, all the strips shown only have two boxes.