A technique for growing common carp in a floating net cage is described herein through simple step-by-step illustrations and instructions. The guidebook covers all required steps, including net cage construction; site selection; fish seed selection, transport, and stocking; recordkeeping; feeding; weighing; harvesting; marketing; and postharvest maintenance. Cage construction requires only seven basic materials -- cement, bamboo, oil drums, netting, nails, plastic rope, and wood. Empty paint tins fastened with strong wire can serve as anchors for the net. The technique was developed for the Saguling and Cirata Reservoirs in Bandung, Indonesia, but may easily be adapted to other locations. Additional guidebooks in this series include Growing Fish in Pen Systems (PN-ABF-178), A Small-scale Hatchery for Common Carp (PN-ABF-176), and Growing Fish in Cages (PN-ABF-177).