I did another test with a different strip that has 25 ppm. It was the 2nd time I opened the bottle to do the test and I got the results you see below, pretty much close to perfect bold pink/purple which indicates the max 25 ppm (in person it looked more matching than in the image).
I did another test with a different strip that has 25 ppm. It was the 2nd time I opened the bottle to do the test and I got the results you see below, pretty much close to perfect bold pink/purple which indicates the max 25 ppm (in person it looked more matching than in the image).
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