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The paper presents the results of tests on quality features of feeding water and fish ponds of Mydlniki fish farm in the małopolskie province. The measurement and control points are situated in the river Rudawa before and below the farm and in four breeding ponds were measured in water: temperature, concentrations of dissolved oxygen, electrolytic conductivity, pH, total suspended solids, dissolved solids and concentrations of minerals: SO4 2+, Cl-, Ca2+, Mg2+, Na+, K+, Fe i Mn, and also biogenic compounds (PO4 3-, N-NH4 +, N-NO2 -, N-NO3 -). It was found that water from the Rudawa river feeding the ponds did not meet the requirements for inland waters which are the natural environment for the cyprinids. The physicochemical state is below the well due to the high concentration of phosphate. Statistical analysis of 19 tested features revealed a positive effect of the fish ponds on water quality. Concentrations of biogenic compounds (phosphate, nitrite and nitrate nitrogen), dissolved solids, calcium and water conductivity in the fish ponds decreased on average by between 30 and 87% in comparison with the feeding watercourse.

INFLUENCE OF CARP BREEDING ON PHYSICOCHEMICAL STATE OF WATER IN FISH POND AND RECEIVE