The In-Pond Raceway System (IPRS) is the culture system that recycle water within the pond with no need to exchange water during culture season. The system require establishing a cell inside ponds and creating water current in the cell. The open pond area subdivided by dikes to allow full circulation of the water through the raceways and around the entire pond before re-entering the raceway cells. The water current carry solid waste outside the cell. Solid waste is pumped out from culture system for other uses to reduce the GHG emission. Culture of genetically improve tilapia achieved very good result.