Hanna Checker Calcium HI758


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The Hanna Checker Calcium is an awesome little tool that will give results in ppm values that are much more common in the aquarium hobby.

Replacement Hanna Calcium Checker Reagent pack available here.

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Category: SKU: TE025 Tag:


Hanna Checker Calcium HI758

The Hanna Checker Calcium HI758 provides a simple, accurate and cost-effective way to measure calcium. Required for the development of calcium carbonate skeletons of coral reefs, calcium is a crucial component of marine waters. Designed as a more accurate alternative to chemical test kits, the HI758 provides quick, accurate results in a few easy steps.

Never use tap water to clean your cuvettes. This is especially important for the HI758 Marine Calcium Checker as calcium is commonly present in tap water and residual amounts present in the cuvette will elevate results produced by the Checker

Replacement Hanna Calcium Checker Reagent pack available here.

Four simple steps to results

  1. First, add sample to the included cuvette.
  2. Next, insert sample into the Checker and zero the instrument with your water sample.
  3. Remove sample and add the reagent
  4. Finally, place the vial into back into the Hanna Checker, press the button and read the results


Easier to use and more accurate than chemical test kits
Large, easy to read digits Auto shut-off
Single button operation – Zero and measure
Dedicated to a single parameter
Designed to work with HANNA’s reagents
Uses 10 mL glass cuvettes
Small Size, Big Convenience
Fits in the palm of your hand
Operated by a single AAA battery


Range: 200 to 600 ppm
Resolution: 1 ppm
Accuracy @ 25°C/77°F: ±6% of reading
Light Source: LED @ 610 nm
Light Detector: silicon photocell
Method: adaptation of the Zincon method
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type: (1) 1.5V AAA
Auto-off: after ten minutes of non-use
Dimensions: 81.5mm x 61mm x 37.5mm (3.2″ x 2.4″ x 1.5”)
Weight: 64 g (2.25 oz.)

What’s Included:

HI758 Hanna Checker is supplied with (2) sample cuvettes with caps, calcium reagent starter kit for 25 tests, dropper,1 ml syringe with tip, 100 microliter pipette with tip, plastic pipette, battery, instructions and quick start guide.

Additional information

Weight 4 kg