HANNA INSTRUMENTS Marine Calcium Checker

The HANNA INSTRUMENTS Marine Calcium Checker (HI758) is a portable photometer designed for the rapid and precise measurement of calcium concentration in water. Calcium is a vital element in aquatic environments, essential for the health of marine life, including the development of bones, shells, and coral skeletons. It is also a primary component of water hardness, which can lead to problematic scale build-up in pipes and equipment.

This dedicated checker simplifies water testing, eliminating the complexity and guesswork associated with traditional liquid test kits. Operation is straightforward: first, zero the device with a prepared reagent and deionised water. Next, add your water sample and a second reagent to the included glass vial, shake to mix, and insert it into the checker. A single button press provides a clear, digital readout of calcium concentration in parts per million (ppm) on a large, easy-to-read display.

Engineered for accuracy and convenience, the HI758 employs a sophisticated Zincon method adaptation, offering a resolution of 1ppm and an accuracy of ±6% of the reading. Its compact, lightweight design (weighing just 64g) makes it perfectly suited for on-the-spot analysis, whether you're at a lab bench, by a marine aquaculture site, or maintaining a home aquarium. The device features automatic shut-off to conserve battery life and is powered by a single AAA battery (included).

Ideal for professionals and enthusiasts in marine biology, aquaculture, and aquarium keeping, this tool provides reliable data to help manage water chemistry, promote aquatic health, and prevent scaling issues effectively.