e. Fish were fed with extruded formulated diets for tilapia (40% and 30% crude protein).
Daily feeding rate was restricted to between 4% and 1.8% of the fish biomass. Temperature, DO and pH
(28.0 ± 1.1 °C, 5.2 ± 1.2 mg L−1 and 7.9 ± 0.2) were within the appropriate ranges for growth, and
TAN, nitrites and total alkalinity (0.29 ± 0.22 mg L−1
, 0.04 ± 0.03 mg L−1 and 238 ± 27 mg L−1
) were
within safe ranges