Salam, I used to culture fish in river cages but encountered many unresolved problems such as DO, water condition, salinity, predators, etc etc. Thus decided to have more control of the situation. Decided to have cage culture in the pond.
Salam, one of the source of help to maintain the pond is em which is made of microbes from the mud of the pond, mollacus, and water. In a week time, its ready to use.