Professional High Range Nitrate Testing for Saltwater Aquariums & Reef Tanks
The Hanna Instruments HI782 Marine Nitrate High Range Checker HC delivers lab-grade accuracy for monitoring nitrate levels in saltwater aquariums, reef tanks, and marine aquaculture. This portable colorimeter measures nitrate from 0 to 75 ppm NO₃⁻-N with digital precision, eliminating the guesswork and color-matching errors common with traditional test strips and liquid kits.
Key Features & Benefits
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High Range Precision: Measures 0 to 75 ppm NO₃⁻-N with ±1 ppm accuracy—ideal for marine systems with elevated nitrate levels
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Marine-Specific Formulation: Designed specifically for saltwater testing, accounting for the unique chemistry of marine environments
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Digital Accuracy: Eliminates subjective color-matching errors with clear digital readout
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Simple One-Button Operation: Get reliable results in minutes with intuitive push-button testing
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Portable Design: Compact, battery-powered unit for on-site testing anywhere
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Cost-Effective: Reusable colorimeter reduces long-term testing costs compared to disposable strips
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Professional Grade: Trusted by reef aquarists, marine biologists, and aquaculture professionals worldwide
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Made in Romania: European quality manufacturing by Hanna Instruments
Why Marine Nitrate Testing is Critical
Nitrate (NO₃⁻) is the final product of the nitrogen cycle in marine aquariums. While less toxic than ammonia or nitrite, elevated nitrate levels cause significant problems in reef tanks and saltwater systems:
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Coral Health: High nitrate inhibits coral growth, reduces coloration, and suppresses calcification in SPS and LPS corals
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Algae Blooms: Excess nitrate fuels nuisance algae growth including hair algae, bubble algae, and cyanobacteria
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Fish Stress: Chronic nitrate exposure weakens immune systems and increases disease susceptibility
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Water Clarity: Elevated nitrate contributes to cloudy water and poor water quality
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Invertebrate Sensitivity: Shrimp, anemones, and other invertebrates are sensitive to nitrate accumulation
Applications
Reef Aquariums: Monitor nitrate levels to maintain optimal conditions for SPS, LPS, and soft corals. Most reef tanks target nitrate levels between 1-10 ppm, though some systems run ultra-low nutrient (ULNS) or higher nutrient levels depending on coral types.
Fish-Only Marine Tanks (FOWLR): Track nitrate buildup from fish waste and feeding to prevent stress and maintain water quality. Marine fish tolerate higher nitrate than corals, but regular monitoring prevents excessive accumulation.
Marine Aquaculture: Ensure optimal water quality in commercial fish farming, hatcheries, and breeding operations for species like clownfish, tangs, and marine ornamentals.
Public Aquariums: Professional-grade testing for large marine displays and life support systems.
Technical Specifications
- Range: 0.0 to 75.0 ppm (mg/L) NO₃⁻-N
- Resolution: 1 ppm
- Accuracy: ±1 ppm ±10% of reading
- Light Source: LED @ 525 nm
- Method: Cadmium reduction method adaptation
- Sample Type: Saltwater/Marine
- Battery Type: 1 x AAA (included)
- Auto-shutoff: After 3 minutes of non-use
- Dimensions: 81.5 x 61 x 37.5 mm
- Weight: 10 oz
- Country of Origin: Romania
How to Use
- Fill sample cuvette with 10 mL of aquarium water
- Add HI782 reagent A packet and shake to dissolve
- Wait 3 minutes for reaction
- Add HI782 reagent B packet and shake vigorously for 1 minute
- Wait 2 minutes for color development
- Zero the Checker with the blank sample
- Insert prepared sample and read nitrate concentration on digital display
What's Included
HI782 Checker HC, 2 sample cuvettes with caps, HI782-25 reagent starter pack (6 tests), AAA battery, instruction manual, and quick start guide.
Important Note: This is the HIGH RANGE marine nitrate checker (0-75 ppm). For low range testing (0.00-5.00 ppm), use the HI764 Marine Nitrate Ultra Low Range Checker.
Made in Romania by Hanna Instruments, the world leader in analytical instrumentation with over 40 years of innovation in water testing technology.
Maintain pristine reef conditions and vibrant coral growth with accurate nitrate monitoring. The HI782 Checker HC is an essential tool for every serious reef aquarist.
