| Studied Treatments | pH | Dissolved oxygen mg/l | Total Hardness as CaCO3 mg/l | Total alkalinity as CaCO3 mg/I | Salinity g/l | NH3 mg/l | NO2 mg/l | Cu+2 P.l. = 1.0 mg/l | Pb+2 P.l. = 0.05 mg/l | Cd+2 P.l. = 0.01 mg/l |
| Group I Control group (Fish reared in dechlorinated tap water and fed commercial diet) | 7.70 ± 0.04 B | 7.96 ± 0.08 A | 158 ± 2.63 B | 119 ±1.3 B | 0.61 ±0.18 B | 0.50 ±0.04 B | 0.67 ±0.04 B | 0.027 ± 0.01 B | 0.014 ± 0.002 B | N.D. |
| Group II (Fish reared in drainage water and fed commercial diet) | 8.32 ± 0.07 A | 5.47 ± 0.16 B | 339 ± 16.1 A | 262 ± 9.9 A | 5.0 ± 0.41 A | 3.91 ± 0.54 A | 5.43 ± 1.03 A | 0.35 ± 0.02 A | 0.18 ± 0.01 A | 0.026 ± 0.05 A |
| Group III (Fish reared in drainage water and fed vitamin C supplemented diet, 5 g/kg diet) | 8.20 ± 0.06 A | 5.60 ± 0.14 B | 333 ± 14 A | 257 ± 11 A | 4.5 ± 0.32 A | 3.56 ± 0.45 A | 5.28 ± 0.76 A | 0.40 ± 0.017 A | 0.15 ± 0.02 A | 0.02 ± 0.004 A |
| Group IV (Fish reared in drainage water and fed fennel supplemented diet, 5 g/kg diet) | 8.10 ± 0.09 A | 5.73 ± 0.21 B | 340 ± 18.9 A | 260 ± 7.3 A | 4.76 ± 0.39 A | 3.77 ± 0.58 A | 5.83 ± 1.14 A | 0.337 ± 0.014 A | 0.20 ± 0.02 A | 0.023 ± 0.004 A |
| F-values | 15** | 58** | 38* | 71** | 38** | 13** | 8.07** | 118** | 40.6** | 16.1** |