Please check out the updated instructions to the K-1720 CYA test from Taylor: Visual Determination, Cyanuric Acid, Turbidimetric, 0-500 ppm. These instructions allow you to test from 20-100 ppm and then down to 0-15 ppm. The update instructions are the 5096. We are very interested in you feedback. You could still test up to 500 ppm, but this does require the dilution discussed in the instructions. (I apologize for any confusion!)
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