2. Immerse the reagent pads into water sample for 2 seconds, remove, after 1 minute match colors to chart below. Total Nitrate/Nitrite (as N) (end pad) 3. Colors are stable for 1 minute. 0 0.5 2.0 5.0 Nitrite (as N) (pad nearest handle) 10 20 50 ppm 0 0.15 0.3 1.0 1.5 3.0 10 ppm pH / hardness / chlorine test instructions 1. Carefully open pH / Hardness / Chlorine Test packet and take out test strip. 2. Immerse the reagent pads into water sample immediately. Hold the strip level for 15 seconds. 3