Pond Professionals and -hobbyisten can easily determine the water values ​​and preserve the Velda Pond Test app. How to analyze the new pond water 1. Download the Velda Pond Test app and start the test function. 2. Select the method you want to use, a test strip or liquid test. 3. Perform the measurement as described in the app. 4. You get after testing the comprehensive test results, background information and advice.