Test Paper - Water Hardness (50 Strips)
Test Paper - Water Hardness (50 Strips)
Code: LW3862-01
The Water Hardness test strip by Precision Laboratories is calibrated at 0, 50, 125, 250, and 500ppm, and is also calibrated at 0, 3, 7, 15, and 30 grains per gallon. Determine whether you have hard or soft water in just seconds. The Water Hardness test strip measures water hardness due to calcium carbonate.