Due to the lack of numerical data for chloride, a statistical comparison was not possible. In addition, blood urea nitrogen concentrations for the high and low NO3-N treated fish were 13.00 ± 1.135 and 10.70 ± 0.857 mg/dL, respectively (P = 0.079). A significant difference was not detected between treatments for blood urea nitrogen, but it was the only measured blood chemistryparameter that trended toward significance