Alkaline, Tap, and Drinking Water pH Level Test kit (WHT/100-125 Tests) 0.50 Fl Oz, More Accurate Than Test Strips, Made in USA, by A2O Water
Usage Instructions: 1. Collect 10cc (2 tsp.) of clear liquid sample 2. Add 2-3 drops of pH reagent to the sample. 3. Compare results with color chart on bottle.