Make aquarium water testing easy with Checker Colorimeters from Hanna Instruments. Powered by a single AAA battery, the Hanna Alkalinity Checker will display Alkalinity readings with the single push of a button. The Hanna Alkalinity Checker measures in ppm. To convert to DKH: ppm / 50 x 2.8 = KH. Alkalinity in a reef aquarium should be between 8-12 dKH. Strive to keep levels stable. Testing weekly and recording the results in a tank journal or log should help! For more aquarium product news and reviews, subscribe to our YouTube channel.

Detailed specs and product reviews about the Hanna Instruments Alkalinity Checker are available on our website: