Hach SofChek Water Quality Test Strips for Total Hardness, 0-425 mg/L
Sofcheck total hardness test strips. 50 test per bottle. Order by the bottle(s) only, can not order by the strip. Sofcheck total hardness test strips come in a bottle with 50 test strips. Just dip the strip into your water and match the color of the strip to the color chart on the bottle to get your reading.