| Day | BSF | Daphnia | Omena | Dagaa |
| 1 | 0.20 | 0.24 | 0.24 | 0.24 |
| 7 | 0.25 | 0.29 | 0.22 | 0.28 |
| 14 | 0.32 | 0.30 | 0.30 | 0.26 |
| 23 | 0.27 | 0.30 | 0.30 | 0.31 |