Water Quality Testing Kit, Nitrate-Nitrogen, Range 1 to 15 ppm, Sensitivity 1.0 ppm, Test System Colorimetric, Number of Tests 50, Replacement Reagents 4EWD9, Includes (2) Plastic Test Tubes with Caps, (50) Nitrate #1 Tablets, (50) Nitrate #2 Test Tablets, Instructions, Octa-Slide Viewer with Slide Bar
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