This kit contains the necessary materials to conduct multiple tests of the hardness ( in grains per gallon ) of the water.

Test includes 3 different chemicals used to accurately determine the hardness of water in Grains Per Gallon ( gpg ).
This is the method that professional water treatment dealers use in the field.
Includes: Hardness (1oz). #1,#2,#3, hardness test bottle, measuring tube, and instructions.
Can be used to test hardness level as high as 100 grains per gallon ( gpg ).

Use narrow long vial to take "sample" of the water.
Put this "vial" of water sample into the square glass container,
THEN ADD
3 drops of # 1
2 drops of # 2
COUNT the drops of # 3 ...
result of number of drops = Grains of Hardness