NECi Nitrate Color Slider
by: NECi • 2
From NECi: Superior Enzymes. For use with the full range of Nitrate Test kits. Use this application to get more accurate results from our kits.
Tap the color square until your test type appears (Water, Soil, etc). Then move the slider till you get the best match to your test kit results. Read the results in the color block.