????????? ?? ??????: ????????? ????? ?? ?????? ????? ?? ??? ???? ????????? ?? ????? ?? ???? ???, ????? ????????? ?? ?????? ?????? ?? ??? ???? ????? ?? ???? ???The leading theory of this technique is to recycle nutrients. It helps in cleansing the society h2o of the fish whilst providing an extra feed source and it is an eco-friendly method.??? ???