Hardness Test Kit

1. Fill the mixing bottle with the water sample to be tested to the top of the etched mark (25ml); the bottom of the curved surface or meniscus should be exactly level with the mark.
2. Add 15 drops of Hardness Indicator Buffer Solution.
3. If the water turns Blue, no hardness is present and the answer is 0 ppm. If the water turns red or purple, hardness is present and the test should be continued.
4. Add HT-2 Hardness Titrating Solution, dropwise, while the drops are counted, until the water changes to a blue color. This is the end point.
5. Multiple the number of drops times your calculation ratio.