A feeding trial was conducted near Nanjing, Jiangsu Province, to demonstrate fry to fingerling growth of pacu using the ASA 80:20 pond production model and ASA soymeal-based feeds. Juvenile fish were stocked in three, 4.0-mu (0.27-ha) ponds at a density of 7,000 pacu and 1,000 silver carp per mu (105,000 pacu and 15,000 silver carp per hectare). Pacu grew from 1.6 g to an average weight of 22 g per fish in 59 days of feeding, with an average FCR of 0.50:1.