Hanna Instruments Marine Magnesium Checker HI783 –

Hanna Instruments Marine Magnesium Checker: Your Go-To Saltwater Magnesium Test Kit

The Hanna Instruments Magnesium Checker HI783 is built for reef tank owners who want consistent, no-fuss magnesium readings. Whether you're fine-tuning your dosing schedule or troubleshooting coral health, this saltwater magnesium checker gives you the numbers fast—and without the guesswork of color charts.

Why the Hanna Instruments Magnesium Checker Makes Life Easier

Stability matters in saltwater tanks. This magnesium test kit keeps you ahead of issues before they cause problems.

• Accurate magnesium readings from 1,000 to 1,800 ppm (parts of magnesium per million parts of water)

• Digital display — no comparing shades of purple or pink

• Color-coded syringes to reduce mistakes during testing

• Compact, portable design that doesn’t hog space on your reef shelf

What Makes This Saltwater Magnesium Checker Worth It?

• It simplifies magnesium testing with quick results.

• You get lab-level accuracy in a handheld device.

• It's ideal for saltwater aquariums, marine labs, and coral farm setups.

Key Specifications of the Hanna Magnesium Test Kit

• Resolution: 5 ppm

• Accuracy: ±5% at 77°F

• Light Source: LED @ 610 nm

• Battery: 1.5V and uses a AAA battery (included)

• Size: 3.4 inches x 2.4 inches x 1.5 inches (length x width x height)

• Weight: 2.3 oz

• Testing Method: Colorimetric EDTA with calmagite indicator

What's Included with the Hanna Instruments Magnesium Checker?

• HI783 handheld checker

• Carrying case for safe storage

• One sample cuvette + two caps

• 25-test starter reagent kit

• 1mL and 5mL syringes (color-coded)

• 1.5V AAA battery

• Step-by-step instructions + quick guide

Tips for Using the Hanna Instruments Magnesium Checker

• Rinse cuvettes only with RODI water to avoid contamination.

• Match the correct syringe to the testing step using the color guide.

• Gently swirl or tap the curvette part to eliminate any trapped air bubbles

• AMake sure to wipe the curvette clean before placing it into the reader for testing.

Saltwater Magnesium Testing Made Simple

The HI783 is more than just a digital magnesium test kit—it's a tool that helps you maintain consistent reef parameters without second-guessing. Whether you’re keeping SPS, LPS, or softies, stable magnesium means healthier corals and fewer headaches.

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