It took a few tries to get used to. I originally thought they were a bit thicker than my pool test set. but they're really paper thin and nasty little ones. BUT I need to bleach my well water and components for my well and check many plumbing around the house. These strips worked great to see if I had enough bleach in my system. Please note: These test strips test between 10 and 200 ppm chlorine. So I needed another strip to make sure there was no more bleach in my well.
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