statistical difference between the water quality of
the control and the treatment ponds during the
period of white shrimp culture. Therefore, the
water was suitable for shrimp culture, in agreement
with the report by Lawhavinit et al. (2006).
However, the presence of ammonia at 5.24 mg/L
is a serious cause of a reduction in phenoloxidase
and causes mortality in shrimp (Lui and Chen,
2004), but in the present study the level was well
below this and thus, the water quality was safe for
shrimp.