Submerge the test strip in the water and after approx. 30 seconds then hold it up to the colour-coded comparison chart and read the results. This will allow you to determine the water hardness based on the change in colour.
Submerge the test strip in the water and after approx. 30 seconds then hold it up to the colour-coded comparison chart and read the results. This will allow you to determine the water hardness based on the change in colour.
Submerge the test strip in the water and after approx. 30 seconds then hold it up to the colour-coded comparison chart and read the results. This will allow you to determine the water hardness based on the change in colour.