The ETS Hach Company TDS Test Strip, available in a practical 25-pack with product code 561683, is a valuable tool for measuring Total Dissolved Solids (TDS) in water. Manufactured by ETS Hach Company, a trusted name in water quality testing and analysis, these test strips offer a simple and efficient method for assessing the concentration of dissolved substances in various water sources, including pools, spas, and more.

Key Features:

  • TDS Measurement: These test strips are designed to measure the Total Dissolved Solids (TDS) concentration in water, which is a key parameter for water quality assessment.
  • 25-Pack: Each package contains 25 test strips, providing an ample supply for multiple tests and ongoing TDS monitoring.
  • Easy to Use: The test strips are user-friendly and straightforward, making them suitable for both beginners and experienced water quality testers.
  • Rapid Results: The test strips typically provide rapid results, allowing you to quickly assess TDS levels in your water sample.
  • Colorimetric Test: TDS levels are determined by comparing the color change on the test strip with a provided color chart, which indicates the TDS concentration.
  • Versatile Application: Ideal for use in residential and commercial water quality testing, including pools, spas, and various other water sources.
  • Water Quality Control: Monitoring and controlling TDS levels is essential to maintain water quality and ensure it meets the recommended standards.


  1. Ensure that the ETS Hach Company TDS Test Strips (Model 561683) are suitable for your specific water quality testing needs and the target TDS range.
  2. Dip a test strip into the water sample you wish to test, ensuring that it is submerged for the recommended duration as per the manufacturer's instructions.
  3. Remove the test strip from the water and allow it to air dry or shake off any excess water, as per the provided guidelines.
  4. Compare the color change on the test strip with the provided color chart, typically indicating the TDS concentration.
  5. Based on the test results, take appropriate measures to manage TDS levels if they are outside the desired range. This may include water treatment or other corrective actions.
  6. Continue to maintain regular testing and monitoring of TDS levels to ensure optimal water quality in your pool, spa, or other water sources.

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