Water hardness testing aid strip to be submerge in the water and after approximately 30 seconds hold it up to the colour-coded comparison chart and read the results. Determine the water hardness based on the change in colour.
Water hardness testing aid strip to be submerge in the water and after approximately 30 seconds hold it up to the colour-coded comparison chart and read the results. Determine the water hardness based on the change in colour.