D-D KH ManagerThe KHManager is a specialised, app controlled, stand alone device, which automatically samples and tests your tank water, then calculates and doses a precise volume of KH solution to maintain a constant alkalinity level within your aquarium. The expandable multi element dosing functionality uses built in software to enable you to integrate the KHManager with specific D D dosing pumps, allowing other elements, such as Calcium and Magnesium, to be