The overall average pH was 6.7 0.3.Weekly average pHs were
7.2, 7.3, 6.4, 6.4 and 6.2 for wk 0 to 4, respectively. A significant pH
drop during wk 1 to wk 2 could be coincided with the measurement
right after the plant’s partial harvest. Speculation for such pH
change is not intended here since similar gap has not been
observed or evident in the other water parameters. No treatment
effects, neither FF nor PP, were found