The diversification of Colombian fish farming is restricted to those species that are described as promising. The group of the silurids includes species on whom it has been possible to stabilize some level of constant experimental effort in the country. In particular, some developments regarding the standardization of the reproductive management of able (Pimelodus grosskopfii) have been achieved; however, information on their behavior under cultivation conditions is only marginal. In a pond on the ground, fry of fodder obtained by artificial reproduction were managed at three planting densities (2, 3 and 4 fish m-2) with commercial concentrate of 25 and 32% crude protein (cp); a design was configured with a total of 6 treatments, each with three replicates. Follow-up was carried out for 6 months, with biweekly sampling in which their performance was evaluated. Water quality monitoring was constant during the period, and in the growth a significant interaction (α=0,05) between the seed density and the percentage of protein in the diet was demonstrated. A higher performance was recorded with 25% cp and at planting densities of 2 and 4 fish m-2.