During the dry season, biochemical oxygen demand was nearly completely expressed after 30d of incubation whereas during the rainy season BOD was about 65% expressed after 31 d of incubation and the correlation between BOD and UBOD was less strong compared to the dry season. water quality varibles were correlated with measures of BOD during rainy and dry seasons, but onty the correlation between chlorophyll a and BOD measures was predictive. In studies 2 and 3, BOD after 88-94 d of incubation was expressed almost completely and corresponded closely with computed UBOD. No significant differences in UBOD were detected in pond samples taken after 30,61,or71 (harvest) d of grow out in study 3. Mean decomposition rate constant ranged from 0.054 to 0.071 in studies 1-3 (rainy season), compared to 0.123 in study 1 (dry season).