Ammonium level

Stocking density  (individuals.m-2)

30

40

50

60

70

Highest (ppm)

0.089

0.101

0.116

0.123

0.092

Lowest (ppm)

0.044

0.045

0.044

0.042

0.044

Beginning (ppm)

0.044

0.048

0.044

0.042

0.044

End (ppm)

0.063

0.076

0.077

0.063

0.076

Table 3: Ammonium level obtained at five different stocking densities during 60 days culture period.
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