Final mean weight of the juveniles in sediment groups 1 mm, 3 mm, 7 mm and 0.2 mm (control) were recorded as 49.18±0.94 g, 44.23±0.35 g, 40.72±0.53 g and 39.57±0.50 g, respectively (Table 2). The mean weight decreases as the grain size increases except control group. As the artificial airflow and water circulation in limited area force tiny sediment particles to be moved continuously, the control group aquarium became turbid from the first week of the treatment.