Use of Total Hardness Test Kit

As long as the water is red, add the liquid drop by drop into the measuring cup. Count each drop and shake the measuring cup after each drop.

 

As soon as the water turns slightly yellowish, gently add one or 2 more drops.

 

As soon as the liquid turns green, you have determined the water hardness by the amount of drops added.

 

 

Water hardness converter

dH° 5 10 15 20 25 30 35 40 45 50
fH° 9 18 27 36 45 53 62 71 80 89
e° 6 13 19 26 31 38 44 50 56 63