Layer hens are known to produce nutrient rich manure. Thai poultry and fish farmer Sattha Ponpaipan uses this knowledge effectively. The manure nutrients from his layer hens are completely used up to feed his fish.
Sattha raises over 20,000 layer hens in four separate houses that are built over ponds which house over 300,000 fish. The hens are fed at 5 am and 1 pm so they produce feces that correspond to the need of the fish during the daytime. Through metal slatted battery cages, feces drop directly into the ponds. Turbines are used to push water with nutrients from under the hen houses to the connecting ponds.
The use of chicken manure to feed fish helps Sattha to reduce his spending on pellet fish food by half and to effectively dispose all the chicken feces. Since the fresh chicken manure is used immediately after excretion, this system avoids any possible losses to the environment. The phosphate-rich sediment of the ponds is regularly removed and used to fertilize nearby trees.