This report is not good. You have to try to be as detail as possible.
1) Picture of the big tank is not there.
2) Percentage of fish death daily before putting in herb is ???
3) After putting in herb
a) Day 1 - number of death ??
b) Day 2 – number of death ??
c) Day 3 - number of death ??
4) Conclusion average number of death ?? (over number of days)
5) If possible, list down type of disease that caused the death of the fish
6) Observe the status of fish (injured, limping, stress).
7) Other observations.