Effect of two prebiotic (A-Max Ultra and Celmanax liquid) inoculation in water quality, growth performance and carcass composition of common carp (Cyprinus carpio) fingerlings in biofloc system

The aim of this studieswas to investigate the effect of tow commercial prebiotic including a-Max ultra and liquid Celmanax in biofloc technology (BFT) based systems on water quality parameters, growth performance, feeding efficiency and carcass composition of Cyprinus carpio fry. For these porpoise, a number of 240 C. carp fry with initial mean weight 4.09±0.70 g (±SD) in a completely randomized design was carried out with inoculation of 0.1 and 0.2 ml each of the prebiotics per liters of biofloc system and a control that was devoid of any substance for 40 days. At the end of experiments, a significant difference was observed in water quality parameters in the treatments of biofloc systems (P>0.05). Measurements of growth parameters including: final weight, final length, velocity of weight, velocity of length, protein efficiency ratio, lipid efficiency ratio and feed conversion efficiency had a significant differences with control group (P<0.05). Maximum of carcass crude protein (66.61%) and minimum of crude lipid (17.89%) was shown in a biofloc system with inoculation of 0.2 ml/liter of liquid Celmanax. The protein and lipid efficiency ratio had a significantly increased in experimental prebiotic treatments (P<0.05). In conclusion, the result of these study indicated that the used of A-Max Ultra and liquid Celmanax prebiotics via inoculation into water system of common carp rearing in a biofloc system had a positive effects on water quality parameters, growth performance, feeding efficiency and carcasses composition in this species.