Water Hardness Test Strips 100 Count, 0-425 ppm

 WHAT IS WATER HARDNESS?
Hard water is formed when water passes through or over limestone or chalk areas and calcium and magnesium ions dissolve into the water.
The hardness is made up of two parts: temporary (carbonate) and permanent (non carbonate) hardness.
When water is boiled, calcium carbonate scale can form, which can deposit on things like kettle elements. The scale will not stick to kettles that have a plastic polypropylene lining but will float on the surface.
The permanent hardness that comprises calcium and magnesium sulphate does not go on to form scale when heated or boiled.

HOW IS WATER HARDNESS MEASURED?
Hardness is usually expressed in terms of the equivalent quantity of calcium carbonate (CaCO3) in milligrams per litre  or parts per million (ppm).

PRODUCT DETAILS:
- Quantity: 100 Test Strips
- Bottle Size: 1.97 x 1.97 x 4.73 inch

INSTRUCTIONS:
1. Take a strip out and dip it into water for 2sec, then take it out.
2. Hold the strip horizontally and wait for 15sec.
3. Compare the color pad to the color chart on the bottle for reading.

NOTICE:
- AVOID polluting testing area such as direct touching.
- AVOID polluting the rest test strips when take one out.
- Close the cap TIGHTLY.
- Store in a cool dry place.