Nitrate/Nitrite test strips are a quick, inexpensive way to test for nutrients

Get reliable results in 60 seconds for a wide variety of water quality measures. Simply dip the test strip in your water sample, and compare the color reaction to the chart provided. Instructions included. USA made. Nitrate/Nitrite (0-50 ppm/0-3 ppm) indicates contaminants from animal wastes or fertilizers. 25 tests.