AquaChek Hardness Spa & Pool Test Strips

AquaChek Hardness Test Strips for hot tubs & pools check total calcium + magnesium. Too low causes corrosion & foam. Too high causes scale & cloudiness. 25 tests.

• Total water hardness
• Low range (up to 120 ppm)
• High range (from 250 to 1,000 ppm)
  

Product Notes: Dip strip, remove, then compare to chart.