In this project a solarpowered system, called Sun-Oxygen-System, for the aeration of aquaculture pond systems, will be developed and tested. The system should improve the usage of naturally occuring dissolved oxygen in aquaculture pond systems and through that, allow the operation of off-grid systems. Accompanied by a training programme (workshops, etc.) a basis is created, which allows women in rural areas in Cambodia, to independently operate a pond aquaculture system.