Hanna Instruments HI781-25 / 781-25 | Marine Nitrate Checker Reagents (25 Tests) | Aquarium Testing

Hanna Instruments HI781-25 / 781-25 | Marine Nitrate Checker Reagents (25 Tests)

Keep your Hanna HI781 Marine Nitrate Low Range Colorimeter running at peak accuracy with genuine HI781-25 replacement reagents. Each kit includes pre-measured, high-purity reagents for 25 tests, making it easy to monitor nitrate levels in your reef aquarium with confidence. Accurate nitrate testing is essential for coral health, fish safety, and long-term aquarium balance.

• Includes reagents for 25 tests
• Compatible with the HI781 Marine Nitrate Checker® HC
• Pre-measured packets ensure consistent results
• Prepared using high purity chemicals
• Clearly marked with lot number and expiration date for traceability
• Designed for reliable monitoring of reef and marine aquariums

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FAQ

• Is this for saltwater only? Yes, HI781 reagents are designed for marine nitrate testing.
• How many tests are included? Each kit includes reagents for 25 tests.
• Do these work with any checker? These reagents are made specifically for the HI781 Marine Nitrate Checker® HC.