How Much Dissolved Oxygen Is Needed To Support Fish Life in the USA

Warm-water fish usually survive at dissolved-oxygen concentrations as low as 1.0 m/L, while cold-water fish normally survive at 2.5 to 3.5 mg/L dissolved oxygen. However, fish and other aquatic animals are stressed, susceptible to diseases and grow slowly at low dissolved-oxygen concentrations. How much dissolved oxygen do fish need to live? Fish, crabs and oysters…