The HI-707 Nitrite Checker is a highly accurate low range tester for nitrite in freshwater and saltwater aquariums. This digital handheld Checker provides the information required to monitor the nitrogen cycle within marine and freshwater fish tanks. With coverage for an extremely low range of nitrite from 0 to 600 ppb, identifying small changes in nitrate levels can allow for fast response to potentially harmful build-up. A Hanna Checker for nitrate is an ideal alternative to aquarium nitrate test kits that require visual comparison, providing a clear digital readout with single-button operation for reliable measurement. Read more
