The purpose of research was to determine the effects of Allzyme SSF administration after introducing of alfalfa meal in feeds, over performances of common carp (Cyprinus carpio L.) and grass carp (Ctenopharyngodon idella V.) juveniles. The experiments where carried out on 75 common carp (Cyprinus carpio L.) – mean initial body weight 47.5g/fish and 75 grass carp (Ctenopharyngodon idella V.) – mean initial body weight 24g/fish; the fishes were randomly distributed in three groups: control group M - feed with base diet, experimental group 1E - 70% base diet and 30% alfalfa meal and experimental group 2E - 70% base diet and 30% alfalfa meal and 0.02% Allzyme SSF. The digestibility coefficient of Crude Protein, Crude Fat and Crude Fiber were higher for common carp and grass carp juveniles after supplementation with Allzyme SSF compared to the other groups. The production and consumption indices were improved for groups 2E from both common carp and grass carp juveniles, compared with 1E group and to the control group. The SGR and FCR were improved in group 2E for common carp and grass compared to the other groups. The results indicate the positive effects of Allzyme SSF on enhancing the ADC of vegetal raw materials.