| This study was conducted to describe the effect of various types of the Probiotic on Fingerlings fish common carp. Cyprinus Carpio L. and to determine the best effect in terms of fish growth parameters (Increase Weight gain, Daily Growth Rate, Specific Growth Rate, Relative Growth Rate, Food Conversion ratio, Food Conversion Efficiency, Apparent Digestibility Coefficient, Apparent Protein Digestibility Coefficient, One handed fish were distributed on five treatments at a rate of 10 Fish per aquarium, and by repeating each treatment. The duration of the experiment was 50 days The fish feed ratios were (5% of body weight given at fixed times (8:30 Am,12:00 Am and 2:00 Pm ). The ratios and types of Probiotic in the feed were: (Control) Normal feed pellets, (T1) Normal feed pellets + Iraq Probiotic 5 g/kg, (T2) Normal feed pellets+ Pro Baghdad 1 GM/kg, (T3) Normal feed pellets + alktrolaisz 1.8 g/kg, (T4) Normal feed pellets + poultry star Me 0.5 g/ kg. The third treatment exceed significantly (P≤0.05) over the rest treatments in (increase Weight gain, Daily Growth Rate, Apparent Digestibility Coefficient, Apparent Protein Digestibility Coefficient). The second and third treatment exceed significantly over the rest treatments in (Specific Growth Rate, Relative Growth Rate, Food Conversion Ratio, Food Conversion Efficiency). Survival rate for the second and the third treatment 100% over the rest treatments, VS of the Control, T1, T4 were (85, 90, 95)% respectively. |