| Day | BSF | Daphnia | Omena | Dagaa |
| 1 | 2.31 | 2.30 | 2.33 | 2.31 |
| 7 | 2.50 | 2.90 | 2.20 | 2.80 |
| 14 | 3.20 | 3.10 | 3.00 | 2.60 |
| 23 | 2.85 | 2.94 | 2.89 | 3.07 |