🍺 Optimized Beer Making Strips - Range of 4 6 6 2 Review

So inaccurate as to be utterly useless. Even after making several solutions of known pH in the strips, they did not change color at all. The only thing I can do to make them stain is put them in a stock solution that's obviously out of range for the test strips.

This is not applicable. You put them down and compare them to a table - they get darker over time. I've tried distilled, tap and bottled water - all the same and I know for sure that we have hard water where we live. Maybe I'm doing it wrong? It's been a while since I've taken any science classes.

I have this plus 3 papers covering the range and 2 dual indicator strips. This seems to be the least accurate and often produces results that are different from others when they all match. I wouldn't recommend it very much.