In presented study two methods of carp breeding: organic in two ponds and one pond conventional were compared. Compared ponds in terms of vegetation variety and birds showed considerable variation. The conventional method of fish breeding characterized by a high stocking material density (1000 heads per ha) and lack of preventive treatments. Organic breeding consisted in reduced fish density (750-600 pcs/kg), prophylaxis consisting in liming the ponds bottom, use of potassium sulfate and use of feed grain from certified organic production. Majority of water resources in all ponds guaranteed in this regard good welfare conditions for the carp breeding. It has been shown that the effects of fish production is affected by such factors as carp density, losses in the production, gains on natural feed and grain. The carp production, both organic and conventional, were assessed as good, despite of low fish survival. Despite of much poorer indicators of water quality, the best production results were recorded in pond No. 9, from conventional farming. Comparison of costs in these two methods of breeding shows that organic production is much more expensive than conventional, and depends on lower production, prevention and more expensive feed.