What Level of Nitrite is Toxic to Fish: A Vital Guide
Freshwater species tread on thin ice when nitrite concentrations reach 0.1 mg/L or higher. These levels are considered dangerous for their well-being. Saltwater species, being a tad more resilient, can tolerate slightly higher nitrite levels, up to 0.2 mg/L. Nitrites play the villain by disrupting the oxygen-carrying capacity of a fish’s blood. Imagine a fish …