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¹ Kherson State Agrarian And Economic University, Department of Water Bioresources and Aquaculture, Kherson, Ukraine DOI : 10.4194/2618-6381-v21_4_05 Viewed : 2247 - Downloaded : 1189 This research investigated Spirulina Platensis, Chlorella vulgaris and Artemia salina as additional sources of protein and biologically active substances that affect the parameters of the carp body. Additional addition of carp to the diet in the ratio: Spirulina Platensis - 40%, Chlorella vulgaris - 30% and Artemia salina - 30% made an impact on the parameters of carp development. The components were cultured in a bioreactor built into a recirculating aquaculture system. The results showed that after additional feeding of carp with the indicated components, the body weight of one-year carp was higher than the control group by 8.9%, and safety by 3.4%. Body weight two-year carp was greater in the experimental group than in the group where the fish ate the total diet. The difference was 12.1% in body weight and 2.9% in safety. These parameters were significantly lower in fish fed the control diet (P<0.05). This scientific work has demonstrated the additional use of natural food as a method for improving the blood composition of carp: an increase in hemoglobin by 15.5% (P<0.05), erythrocytes by 5.5% in comparison with the control group. Indicators of gas-discharge visualization of a biological object supplemented the obtained result. Keywords : Carp, Food factor, Natural feed, Growth, Physiological processes