There were no significant differences in final weights
or weight gain (%) of shrimp reared in low salinity waters
containing various levels of Mg2+ (Table 3). Final weights
ranged from 3.25 to 3.67 g, while weight gain ranged from
144.0 to 181.4% across treatments. Nevertheless, the
trend for the treatment with the highest concentration of
Mg2+ (160 mg l − 1) to yield the largest weight gain, while
the treatment with the lowest concentration of Mg2+
(10 mg l − 1) to yield the lowest weight gain was worth
noting. Survival in the lowest Mg2+ treatment (10 mg l − 1)