The potential effect of biofloc system and pro-pac on water quality and growth performance of nile tilapia (oreochromis niloticus)

Abstract

This study was conducted over a period of 90 days to examine the impact of varying concentrations of Biofloc (with C/N ratios of 10/1 and 15/1) and Pro-Pac (at concentrations of 250 and 500 mg/l) on the water quality, feed utilization and productive parameters of Nile tilapia (Oreochromis niloticus) fingerlings. The fingerlings in this study were rearing in 27 plastic tanks in nine treatments (triplicate per each) , each containing 100 liters of water. Sub-zero water exchange with addition of molasses excluding control tanks. The fingerlings were nourished a commertial diet containing 25% crude protein at a rate of 2% of their live weight daily. The outcomes of this study indicated that, the water quality parameters were improved significantly compared to the control. Moreover, the using of Biofloc and Pro-Pac at varying concentrations significantly improved the final body weight and specific growth rate (SGR) for different groups compared with control. Additionally, the feed conversion rate, along with the efficiency of protein utilization, was found to be greater in the fish tanks administered with Biofloc and Pro-pac, as compared to the control. The addition of Biofloc and Pro-Pac caused an increase in the crude protein percentage in the fish body, and the etheric extract percentage also increased and ash was reduced. The beneficial Accordingly, it could be concluded that the growth performance was increased by increasing the Biofloc and/ or Pro-pac concentration