The Hanna Instruments HI 38033 Total Hardness Test Kit is used to meaure water hardness, which has traditionally been
defined as the capacity of water to precipitate soap. The ionic species in the water causing the precipitation was later
found to be primarily calcium and magnesium. In the present, therefore, water hardness is actually a quantitative measure
of these ions in the water sample. WIth the Hanna Instruments HI38033, it is also now known that certain other ion
species, such as iron, zinc and manganese, contribute to the overall water hardness. The measure and subsequent control
of water hardness is essential to prevent scaling and clogging in water pipes.