Industrial Test Systems WaterWorks 481108 Total Hardness Test Strip, 3 Second Test, 0-1000ppm Range, Our #1 Test Strip for Total Hardness, Bottle of 50 Tests, Tan

✅ DETECTION LEVELS: Total Hardness 0, 40, 80, 120, 180, 250, 425, 1000 ppm✅ EASY TO USE: Single dip and read test strip procedure and optimized color chart make the...