Total Hardness Test Strips
Easily monitor calcium hardness to protect your pool surfaces and equipment.
Test your water’s hardness in seconds. Our easy-to-read test strips accurately measure Total Hardness, helping you prevent scale buildup and keeping your water perfectly balanced and safe for your equipment.
Product Information
- Parameters tested 1 (Total Hardness)
- Strips per bottle 50 Strips
- Results in 15 seconds
- For use with Water
- Storage Store in a cool, dry place. Always close the lid tightly to block out air.
- Certifications FDA, ISO, RoHS
How to Use
Dip
Immerse all the testing parts of the test strip into water for 2 seconds and take it out.
Wait
Do Not shake excess water off, hold the strip horizontally for 15 seconds.
Read
Compare against the color chart and read immediately for accurate results.
What You Test
Recommended ideal ranges for pool and spa water. For a detailed explanation of each parameter and what to do if values are off, visit our Water Chemistry Guide.
Warning about test strip use during measurement Situations that can affect the accuracy of results
To obtain reliable measurements with test strips, it is important to keep the following situations in mind, as certain water parameter levels can alter the results:
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Excess chlorine
It is very important to avoid excessively high chlorine levels in the water. Excess chlorine can alter the colouring of the different pads on the test strip and, as a result, affect the interpretation of the remaining parameters. For a correct measurement, we recommend testing with a chlorine level within normal values.
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Low alkalinity levels
Alkalinity that is too low can affect the accuracy of the pH measurement. Under these conditions, the test strip may indicate a pH level lower than the actual one. If the alkalinity pad shows a yellow colour, indicating very low alkalinity, the pH result may also be affected. To guarantee a more reliable measurement, we recommend keeping alkalinity above 70 ppm.
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Low alkalinity levels and cyanuric acid measurement
Low alkalinity levels can also cause incorrect results in the cyanuric acid (chlorine stabiliser) measurement. When low alkalinity is combined with a pH below 7.2, there is a high probability that the stabiliser result will be unreliable or incorrect.
Recommendation
Before interpreting the test strip results, make sure the water parameters are within the recommended levels or, at the very least, that there are no significant excesses or deficits of the elements analysed. This helps minimise possible interference and obtain more accurate, more reliable measurements.