http://journalstar.com/lifestyles/home-and-garden/differences-in-water-can-affect-cleaning-performance/article_b08776c7-0463-5994-b7ba-c5648f0fd110.html
When getting test strips out of a bottle the reagent pad may appear slightly purple instead of blue. This is ok, the color of the reagent pad out of the bottle does not impact the testing.