Hanna Instruments HI781 Marine Nitrate Low Range Colorimeter for Reef & Saltwater Aquariums aquarium water tester Any discoloration or scratches will

Any discoloration or scratches will interfere with any optically based measurement

IP67 Waterproof: Fully submersible

Agricultural impact: High chloride can damage crops and affect soil quality

Starter Calibration solution MI0038B (6

Replacement Parts & Accessories

Hanna Instruments HI781 Marine Nitrate Low Range Colorimeter for Reef & Saltwater Aquariums aquarium water tester Any discoloration or scratches willHanna Instruments HI781 Marine Nitrate Low Range Colorimeter Protect your reef and saltwater aquarium with pinpoint nitrate accuracy. The Hanna Instruments HI781 Checker HC is a handheld colorimeter engineered to measure low range nitrate levels from 0. 00 to 5. 00 ppm (as NO3) far more reliably than color matching test kits. No more squinting at color charts; get a clear digital readout every time. Why Nitrate Control Matters in Reef Aquariums