hach 5b

On this forum, people have strongly recommended using the Hach 5B Hardness Test Kit to measure the hardness of water. The determined hardness is used to calculate the size of the water softener. However, Inspectapedia, a reputable website (that's used for building and environmental...

I bought a Hach 5B just to periodically test my water hardness. I know that my GPG is usually around 32. I got the test kit today and tested the water but the water never turned from pink to blue no matter how many drops were administered. The instructions and the process are both extremely...