Knowledge Base

Here you will find a list of frequently asked technical questions.
If you would like more information about our products and their features, please contact us using our contact form.

We are at your disposal for any request.

Questions and answers

To ensure our customers can easily get started with fluid analysis, we have developed a support page. There you will find descriptions of the parameters and questions from other customers. You can also ask questions about this yourself. At the moment this support page is only available in English – we are currently working on a German version.

To support
  • EC Value in Hydroponics

    EC Value in Hydroponics

    How to Properly Measure and Adjust the pH Level in Your Aquarium: Ideal Levels for Freshwater and Saltwater. Which Tester Is Right for You?

  • Testing Pool Water: How to Measure pH, Chlorine, and Hardness Correctly

    Testing Pool Water: How to Measure pH, Chlorine, and Hardness Correctly

    Pool Water Testing Made Easy: Why chlorine alone isn’t enough, which levels really matter, and how to reliably measure pH, chlorine, and hardness.

  • pH Level in the Aquarium

    pH Level in the Aquarium

    How to Properly Measure and Adjust the pH Level in Your Aquarium: Ideal Levels for Freshwater and Saltwater. Which Tester Is Right for You?

  • Proper Storage and Care of pH Electrodes

    Proper Storage and Care of pH Electrodes

    Improper storage is the most common cause of premature failure of a pH electrode. Learn how to properly care for your electrode and extend its service life.

  • Calibrate a pH meter

    Calibrate a pH meter

    No pH meter can provide reliable readings without calibration. Learn how to calibrate your device properly, which buffer solutions you need, and how often you should calibrate it.

  • Measure pH value

    Measure pH value

    Measuring pH Made Easy: Test Strips vs. pH Meters, the Right Procedure in 5 Steps, and the Most Common Mistakes When Taking Measurements.

  • What is the pH value?

    What is the pH value?

    The pH level indicates whether a liquid is acidic, neutral, or alkaline. Learn what it means, how it is measured, and why it is so important.

  • What is called a “double junction” ?

    What is called a “double junction” ?

    Double-Junction Electrodes Explained: Structure, Differences from Standard Electrodes, and When They’re Really Worth Using. Includes an overview of compatible Apera electrodes.

  • What is the oxidation-reduction potential (ORP)?

    What is the oxidation-reduction potential (ORP)?

    ORP and Redox Potential Explained: What the Value Means, How Oxidizing and Reducing Environments Differ, and Where ORP Is Used in Water Treatment, Aquaculture, and Industry