I use these test strips to test the pH of my garden water (possibly) and the pH of my dye baths. They seem to do what they're supposed to, so I have no complaints. This is a thin sheet of paper that you tear off, quickly dip it in the water and compare it to the attached chart. It was easy for me to make a comparison as you can just place paper in front of the board and choose the one where the color difference is least noticeable. My water is tested at 7 which is right in the middle of the pH scale. Most would think it's great, but coloring it can produce good colors if you lean towards one end or the other. This is not a problem as there are ways to raise or lower the pH and get what I want. Excellent ph bands as far as I can tell so far. When creating my reviews, I pay full attention to the quality of the product, communication with the seller and the longevity of the product. I check my reviews from time to time to ensure the review is as current as possible based on my continued use of the product. This ensures that the product not only performs well upon delivery, but also maintains stable quality.
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