Table 5 Mean weekly variations in water quality parameters in tank 3 (Coppens fish feed)
Week | Temp (°C) | pH | EC μS/cm | TDS mg L−1 | DO mg L−1 | NH3 mg L−1 |
|---|---|---|---|---|---|---|
1 | 27.2 ± 0.1 | 6.8 ± 0.1 | 240 ± 0.1 | 161 ± 0.1 | 6.2 ± 0.1 | 0.11 ± 0.01 |
2 | 27.1 ± 0.1 | 6.8 ± 0.1 | 244 ± 0.1 | 164 ± 0.1 | 6.3 ± 0.1 | 0.11 ± 0.01 |
3 | 27.0 ± 0.1 | 6.9 ± 0.1 | 249 ± 0.1 | 164 ± 0.1 | 6.3 ± 0.1 | 0.12 ± 0.01 |
4 | 27.0 ± 0.1 | 6.9 ± 0.1 | 246 ± 0.1 | 165 ± 0.1 | 6.3 ± 0.1 | 0.12 ± 0.01 |
5 | 26.9 ± 0.1 | 6.9 ± 0.1 | 246 ± 0.1 | 165 ± 0.1 | 6.4 ± 0.1 | 0.12 ± 0.01 |
6 | 26.9 ± 0.1 | 6.9 ± 0.1 | 250 ± 0.1 | 168 ± 0.1 | 6.4 ± 0.1 | 0.13 ± 0.01 |
7 | 26.8 ± 0.1 | 7.0 ± 0.1 | 254 ± 0.1 | 170 ± 0.1 | 6.4 ± 0.1 | 0.14 ± 0.01 |
8 | 26.6 ± 0.1 | 7.0 ± 0.1 | 256 ± 0.1 | 172 ± 0.1 | 6.5 ± 0.1 | 0.16 ± 0.01 |
9 | 26.2 ± 0.1 | 7.0 ± 0.1 | 260 ± 0.1 | 174 ± 0.1 | 6.5 ± 0.1 | 0.16 ± 0.01 |
10 | 26.0 ± 0.1 | 7.1 ± 0.1 | 264 ± 0.1 | 177 ± 0.1 | 6.5 ± 0.1 | 0.18 ± 0.01 |
11 | 25.8 ± 0.1 | 7.1 ± 0.1 | 268 ± 0.1 | 180 ± 0.1 | 6.6 ± 0.1 | 0.18 ± 0.01 |
12 | 25.2 ± 0.1 | 7.1 ± 0.1 | 272 ± 0.1 | 181 ± 0.1 | 6.7 ± 0.1 | 0.19 ± 0.01 |
13 | 24.8 ± 0.1 | 7.1 ± 0.1 | 278 ± 0.1 | 186 ± 0.1 | 6.8 ± 0.1 | 0.20 ± 0.01 |
14 | 24.5 ± 0.1 | 7.2 ± 0.1 | 278 ± 0.1 | 186 ± 0.1 | 6.8 ± 0.1 | 0.20 ± 0.01 |
15 | 24.2 ± 0.1 | 7.2 ± 0.1 | 280 ± 0.1 | 188 ± 0.1 | 6.9 ± 0.1 | 0.20 ± 0.01 |
16 | 24.1 ± 0.1 | 7.2 ± 0.1 | 280 ± 0.1 | 188 ± 0.1 | 6.9 ± 0.1 | 0.20 ± 0.01 |
Overall total mean | 26.01 ± 0.1 | 7.01 ± 0.1 | 260.05 ± 0.1 | 174.20 ± 0.1 | 6.59 ± 0.1 | 0.16 ± 0.01 |