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The RDTK3051-Z Hardness Test Kit.

RDTK3051-Z Total Hardness (Powder Indicator)
1 drop = 2 or 10 ppm as CaCO3/25mL
Reagents: RDED2070-B, RDED2073-B, RDHA7405-A, RDHA7475-H

Other Hardness test kits we sell are:

RDTK3039-Z Total Hardness
1 drop = 10 ppm as CaCO3/25mL
Reagents: RDED2070-B, RDHA7405-A, RDHA7475-H

RDTK3052-Z Calcium Hardness
1 drop = 10 ppm as CaCO3
Reagents: RDED2070-B, RDCA1119-A, RDCA1100-H

RDTK3053-Z Total Hardness (Cleaning & Sanitation Test Kit)
1 drop = 10 ppm/25mL
Reagents: RDED2070-B, RDHA7405-A, RDHA7430-A

RDTK3055-Z Total Hardness (Liquid Indicator)
1 drop = 2 or 10 ppm as CaCO3/25mL
Reagents: RDED2070-B, RDED2073-B, RDHA7405-A, RDHA7430-A

RDTK3057-Z Trace Hardness
1 drop = 0.5 ppm as CaCO3/25mL
Reagents: RDHA7475-H, RDHA7407-A, RDED2064-B

RDTK3058-Z Trace Hardness
1 drop = 0.5 ppm as CaCO3/25mL
Reagents: RDHA7475-H, RDHA7405-A, RDED2064-B

RDTK3059-Z Total & Calcium Hardness
1 drop = 2 or 10 ppm as CaCO3/25mL
Reagents: RDED2073-B, RDED2070-B, RDCA1119-A, RDHA7430-A, RDCA1100-H, RDHA7405-A

For the most accurate test results, it is advisable to replace ALL of your reagents annually. Some reagents can go bad and others can become contaminated with impurities or other reagents during use.

Prices for the Continental 48 states of the USA only.