The Kamoer KH Carer Aquarium Alkalinity Tester is an automatic testing device measuring KH values (Alkalinity) in an aquarium. It includes manual and automatic detection functions. Users can easily view the test results and set the test parameters in the Android or iOS app. The equipment can adjust the KH value according to the test results automatically. Useful Articles:Controllers: An Overview of What Aquarium Equipment You Can Automate.