Test equipment – Pool & Spa

Measuring and testing equipment for pool and spa - pH - Cyanide - Chlorine - Alka

To ensure high quality in your bathing water, you must add several different types of products. But to find out what amount to add to the water in your pool or hot tub, you need to test the water.

You can test the water in several ways – either with test strips, a hand shaker or a photometer.

You should test your water at regular intervals to detect any problems and then adjust your bathing water. Most often, pH value (pHenol red tablet), Free chlorine (DPD no. 1 tablet), Total chlorine (DPD no. 3 tablet), Alkalinity (ALKA-M tablet) & Cyanide (Cyanuric acid tablet) are measured.

Test equipment – Pool & Spa

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  1. SmartTest Photometer
    • Applications: Swimming Pool

    SmartTest from Wendt & Sørensen is a photometer that precisely measures free and total chlorine, pH, cyanuric acid (if you use stabilized chlorine), as well as alkalinity.

    With a SmartTester, you get a correct and precise measurement every time and at the same time you avoid the sometimes difficult readings with test strips or other test methods.

    The tester is an improved version of the well-known Scuba II.

    Avability:In stock
    €125.98
  2. Refill Pack for SmartTest Photometer
    • Applications: Swimming Pool

    This is a Refill Pack for the SmartTest Photometer/SCUBA II. The package contains 60 photometer tablets:

    • 20 DPD No. 1
    • 10 DPD No. 3
    • 10 pHenol Red
    • 10 Alka-M
    • 10 cyanuric acid
    Avability:In stock
    €12.33
  3. pHenol Red - pH - Photometer
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    With pHenol Red test tablets, you can measure the pH of pool water in a photometer.

    The package contains 10 tablets.

    Avability:In stock
    €1.61
  4. Cyanuric Acid - Photometer
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    With these cyanuric acid test tablets, you can perform a measurement of cyanuric acid in the pool water in our Smarttester.

    The package contains 10 tablets.

    Avability:In stock
    €2.68
  5. DPD no. 1 - Free chlorine - Photometer
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    DPD No. 1 Rapid test tablets are employed for measuring levels of free chlorine in our Smarttester.

    There are 10 tablets in the package.

    Avability:In stock
    €1.29
  6. DPD no. 3 - Total Chlorine - Photometer
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    DPD No. 3 test tablets for measuring total chlorine. Can be used in our Photometer.

    There are 10 tablets in the package.

    Avability:In stock
    €1.29
  7. ALKA-M - Photometer
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    With Alka-M test tablets, you can measure the alkalinity of the pool water with our Smarttester.

    The package contains 10 tablets.

    Avability:In stock
    €3.75
  8. Lovibond Tablet tester chlorine/pH
    • Applications: Swimming Pool

    Our Pooltester Chlorine/pH is a tablet tester that measures the chlorine levels and pH value in your pool water.

    Our Pooltester Chlorine/pH is easy to use. Start by removing the lid and then fill the tester with water from your pool. Now add a tablet and shake the tester. You will now be able to read the values.

    NOTE! The tablet tester cannot measure the total alkalinity in the water. To measure alkalinity in the water, we recommend using SmartTest or test strips that can measure alkalinity.

    Avability:In stock
    €14.47
  9. DPD no. 1 - Free chlorine - Test for hand shaker
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    DPD No. 1 Rapid test tablets are used for measuring free chlorine in our hand shaker.

    The package contains 10 tablets.

    Avability:In stock
    €1.29
  10. DPD no. 3 - Total Chlorine - Test for hand shaker
    • Details, Additional: 10 tabs
    • Applications: Swimming Pool

    DPD no. 3 Rapid test tablets for measuring total chlorine. You use these tablets together with DPD No. 1 to measure total chlorine in a handheld tester.

    The package contains 10 tablets.

    Avability:In stock
    €1.29
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Testing Water Quality in Pool & Spa

Testing the water quality in pools and spas is essential to ensure safe and comfortable bathing water. Here is a basic guide on how to test water quality and what parameters to pay attention to:

  1. Important Parameters for Water Quality

    • pH Level: Ideally, the water's pH level should be between 7.0 and 7.4. A pH within this range ensures that the water is neither too acidic nor too basic, which can affect the effectiveness of disinfectants and bathing comfort.
    • Chlorine Content (or other disinfectants): Chlorine is the most commonly used disinfectant to kill bacteria and other microorganisms. For pools, a chlorine level of 1-3 ppm (parts per million) is recommended, while spas often require higher levels due to the higher water temperature.
    • Total Alkalinity: Measured in ppm, alkalinity should be between 80 and 120 ppm. This helps stabilize the pH level.
    • Calcium Hardness: To prevent damage to the pool or spa surface and equipment, calcium hardness should be between 200 and 400 ppm for pools and slightly higher for spas.
    • Cyanuric Acid: Used in chlorine-treated pools as a stabilizer, its level should be between 30-50 ppm to prevent chlorine from being broken down by sunlight.
  2. Testing Methods

    • Test Strips: These are quick and easy to use. Dip them in the water, and compare the color changes to a scale to read the values.
    • Liquid Reagent Kits: These kits often provide more accurate results than test strips. You add a sample of pool water to a measuring cup and then add a specific amount of reagent. The color change is then read against a color scale.
    • Digital Tester: For those seeking more precise measurements, digital testers are a good choice. They can provide quick and accurate readings of multiple water quality parameters.
  3. Frequency of Testing

    • Pools: It is recommended to test the water at least once a week for private pools and daily for public pools.
    • Spas: Due to the higher temperature and higher level of use, it is recommended to test spa water more frequently, preferably daily.
  4. Maintenance Based on Test Results

    Once you have the test results, you can adjust the water quality by adding the necessary chemicals to bring the values within the recommended ranges. This may include adjusting the pH level, adding chlorine or other disinfectants, and adjusting alkalinity and calcium hardness.

  5. Using Guides

    If you are unsure how to handle the results or if you experience persistent problems with water quality, it might be a good idea to consult guides from Wendt & Sørensen / Filter-Online. When you purchase a product for pool and spa, a guide often comes with it that tells you about the ideal values in your pool and spa, and what to do to get closer to these values.

Maintaining correct water quality is not only important for bathing comfort but also to extend the life of your pool or spa and its equipment. Regular testing and proper chemical balance are key to a safe and inviting water environment.