[cr1895]

If you look at the color of the top block, it's matching somewhere between 3 and 4. Botulism is avoided if the pH is under 4.6.

The test strip is sitting on 6 but it would have to be darker to have that high a pH.

[mrcms]

This is the correct reading. I had it at 3-4 as well. The camera also saturates the colors a bit.