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
  • PH20 vs. PH60

    PH20 vs. PH60

    PH20 or PH60: We compare the accuracy, measurement range, and ORP option of these two Apera meters to help you make your purchase decision.

  • How to Accurately Measure Dissolved Oxygen in a Garden Pond

    How to Accurately Measure Dissolved Oxygen in a Garden Pond

    How much dissolved oxygen your garden pond needs, what warning signs indicate a lack of oxygen, and how to measure it correctly. Includes immediate steps to take in an emergency.

  • EC Value in Hydroponics

    EC Value in Hydroponics

    The EC level in hydroponics is important for a good harvest. This article provides specific target values for the most common hydroponic plants, explains how to adjust the EC level throughout the growth cycle, and highlights the most common mistakes made when taking measurements.

  • 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.