The results on water quality and meteorological data are shown in Table 1. During cultivation the pond showed little variation in temperature (26.7 ºC to 28.5 °C), a mean salinity of 31.2 ± 2.0 and slightly alkaline mean pH (8.1 ± 0.3). Transparency did not exceed 33 cm and maximum turbidity was registered at the end of the experiment (116 NTU).