Question

6. The unit measuring the hardness of
water is ​

Answer 1

I think answer is grins

Answer 2

Answer:

plz mark me brainliest

Explanation:

Water hardness is measured in "grains" per gallon, in milligrams of calcium (Ca) per liter, or parts per million, and German Degrees of Hardness (dH) [which we drop here as this is for fish tanks]. You can take a water sample to a water test lab to have its hardness measures.