In commercial aquaculture, one of the most important indicators is the temperature in which the fish are kept. To create conditions, as close to ideal as possible, it is necessary to know various hydrochemical parameters, one of the most important is the water temperature. In various fish feeding discounts, the daily ration comes primarily from the water temperature, as well as the age of the fish. Sources for carp provide temperatures ranging from 18 to 25 ° C, and it is noted that these temperatures are most suitable for commercial fish farming. However, the works do not give the maximum limiting temperature of the content. This article presents a study on the maximum temperature of the content of Cyprinus carpio in the conditions of closed water supply installations according to the parameters of feed consumption. As a result of the work, the maximum temperature of koi carp keeping was determined. It is also possible that breeding carp at high temperatures will significantly increase fish productivity, while not significantly increasing the dose of feeding

In commercial aquaculture, one of the most important indicators is the amount of feed applied and feed consumed. To achieve maximum growth and a low feed ratio, it is necessary to establish the amount of feed consumed by fish in different conditions. In aquaculture, the amount of feed per group of fish is based on the calculation of the biomass of the fish, taking into account its growth rate. Thus, the transfer of fish, transportation of under yearlings and yearlings from one farm to another is a strong stress for the fish. One of the acclimatization procedures in such conditions is the regulation of feeding and the use of special feed. Under such conditions, it is rather difficult to measure the primary food requirements, since there is still no data on the growth of fish under current conditions. This article presents a study of the maximum single dose of food for Cyprinus carpio after movement and acclimatization in the new environment.