Review on Hanna Instruments HI781: Your 🌊 Reliable Low Range Saltwater Nitrate Checker by Ruth Haiar

I understand why most people are cautious about using this nitrate tester. When you open the box, it looks intimidating. There are many steps you need to take to get a reading. But I'm telling you, it's worth all those extra steps. After a while it becomes muscle memory. If you have nitrate levels above 5ppm you can test this by diluting, but you will need freshly made salt water. I compared this to other nitrate tests and they were accurate.