The Hanna Marine High Range Nitrate Checker HC (HI782) makes monitoring nitrate levels in your saltwater aquarium easier and more reliable. Designed specifically for marine aquariums and reef tanks, this digital handheld colorimeter delivers accurate nitrate measurements directly in parts per million (ppm), eliminating the guesswork of traditional colour-matching test kits.
Nitrate is one of the most important nutrients to monitor in a marine aquarium. While some nitrate is beneficial for coral health, excessive levels can contribute to unwanted algae growth and negatively impact sensitive corals. The Hanna HI782 allows you to accurately track nitrate levels, helping you maintain a balanced and healthy aquarium environment.
Key Features
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Digital Nitrate Testing – Displays nitrate readings directly in ppm, removing the guesswork of traditional colour charts.
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High Range Measurement – Tests nitrate concentrations from 0.0 to 75.0 ppm, ideal for a wide variety of marine aquariums.
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Designed for Saltwater Aquariums – Perfect for reef tanks, coral aquariums and fish-only marine systems.
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Accurate & Reliable – Measures nitrate with a resolution of 0.1 ppm for consistent monitoring.
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Simple One-Button Operation – Straightforward testing suitable for beginners and experienced reef keepers.
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Supports Nutrient Management – Helps monitor nitrate levels and make informed adjustments to feeding, filtration and nutrient export.
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10 Tests Included – Supplied with starter reagents for 10 tests.
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Replaceable Reagents – Compatible with Hanna HI782-25 Marine High Range Nitrate Reagents.
Technical Specifications
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Model: HI782
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Testing Parameter: Nitrate (NO₃⁻)
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Measurement Range: 0.0–75.0 ppm
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Resolution: 0.1 ppm
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Accuracy: ±2.0 ppm ±5% of reading at 25°C
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Testing Method: Zinc Reduction Colorimetric Method
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Light Source: LED at 525 nm
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Battery: 1 × AAA (included)
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Automatic Shut-Off: After 10 minutes of inactivity
What's Included?
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Hanna HI782 Marine High Range Nitrate Checker HC
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Marine nitrate high range reagents for 10 tests
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2 sample cuvettes with caps
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3 mL Pasteur pipette
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1 AAA battery
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Instruction manual
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Protective storage case
Why Is Nitrate Important in a Reef Aquarium?
Nitrate plays an important role in the overall nutrient balance of a marine aquarium. Corals and other organisms require nutrients to thrive, but elevated nitrate levels can encourage nuisance algae and potentially affect coral health.
Regular nitrate testing allows you to monitor nutrient trends, evaluate the effectiveness of your filtration and make informed decisions about feeding, water changes and nutrient management.
High Range vs Low Range – Which Hanna Checker Should You Choose?
The Hanna HI782 High Range Nitrate Checker measures nitrate between 0.0 and 75.0 ppm, making it an excellent all-round choice for most marine aquarium hobbyists.
For reef keepers who need greater precision at extremely low nitrate concentrations, the Hanna HI781 Low Range Nitrate Checker may be a better option.
Why Choose Hanna?
Hanna Instruments has become a favourite among reef keepers for its convenient digital water testing equipment. The HI782 makes nitrate testing straightforward, helping you spend less time interpreting colour charts and more time enjoying your aquarium.
