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Water Hardness Test Strips - 50 strips at 0-425 ppm

Check For Calcium, Magnesium, and Total Hardness


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  • 30 day money-back guarantee
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Measure your water hardness for accurate water softener calibration.

Your health, home, and wallet could be suffering as a result of the hardness of your water. If you don’t know what that is, it’s basically the amount of dissolved calcium and magnesium in your water.

You may notice it in the film left on your hands after washing, the residue on your plates and glasses, or scaling over the taps in your home. More subtle signs can appear over time though, with increased costs in heating, soap usage, and appliance damage.

This test kit allows you to test your total water hardness from 0-25 GPG or 0-425 PPM, so that you can calibrate your water softener and avoid the potential problems in your home.

All our products are stored in Amazon Fulfilment centres to be able to deliver them to you quickly and reliably. Please allow us 1 day to process your order and 5-7 days to receive it. Some orders will arrive even as fast as 3 days but the logistics and shipping speed is not something we can control.

Easy to use, easy to read

Accurate and Reliable

Instant Results

Most of the USA have hard water - in fact 85% of us get to deal with it on a daily basis. Only 30% of us are using a water softener though.

When hard water is heated, solid deposits of calcium carbonate can form. This scale can damage almost anything that comes in contact with the water, including your appliances, boiler/water-heater, pipes, fabrics, and clothes.

When using hard water, more soap or detergent is needed to get things clean, be it your hands, hair, or your laundry. This becomes evident through the additional time spent washing things, the (up to 50% higher) soap usage, as well as noticeably dryer skin and duller hair.

Easy to Use and Understand

No lab assistance or “professional” help required

The clear color chart makes testing easy enough for anyone

Free user guide and unlimited support included

Instant Test Results

Find out your results within 30 seconds of testing

Reliable results from high quality test strips

Compatible with any softener thanks to both GPG and PPM measurements

Everything You Need in One Bottle

No mailing, extra fees, or equipment required

Regularly test and maintain your water with 50 test strips

Calibrate your softener and retest up to 10 months after opening

hard water testing strips

Dip the strip in the water for 1 second and shake off any excess.

hard water testing strips

Wait pad-side up for 30 seconds.

hard water testing strips

Match the results within 2 minutes.

What people are saying

The directions were easy to follow and the strips were easy to use.


The kit includes

1 x 50 Test Strips

1 x Testing Guide


  • Fast shipping from an Amazon fulfilment centre near you
  • 30 day money-back guarantee
  • 100% safe and secure checkout

Simple testing or money back guaranteed

hard water testing strips

Accurate results that anyone can test for

hard water testing strips

Customer support ready to help with testing and reading the results.

hard water testing strips

30-day complete satisfaction money back guarantee


  • Is water hardness a health concern?

    No; calcium and magnesium are natural minerals that pose no known health issues.

  • The water hardness test strips are brown. Is this normal?

    Yes. The color pad can appear deep olive to brownish when removed from the container.

  • Can hard water cause dry and stringy hair?

    Yes; hardness minerals can lead to hair feeling dry and brittle and can interfere with certain hair care products.

  • Can I test my water softener with the test strips?

    Yes; the test strips will show if your water softener is working. Usefully, you can also use the test strips to determine how often to set the regeneration cycle.

  • Can the water hardness strips be used more than once?

    No; please discard the individual strip after each use.

  • The test strips color did not change. Why?

    If the water being tested is very low in minerals, the color on the test strip may not change or only shifts only slightly in color. Be sure to view the strip under daylight conditions.

  • What is the shelf life of the strips once opened?

    Once the bottle is opened, use the test strips within 12 months. We advise you to keep the cap tightly closed after each use; please store it at room temperature away from direct sunlight.

  • Can I use the Health Metric TDS Meter to test water hardness?

    No; TDS measurements include dissolved minerals, salts, nitrates, and other substances. The Water Hardness Test Strips are the proper way to test for water hardness, without interference from other substances that may be present in the water.