An experiment was carried out to evaluate the effects of different amounts of supplementary feeds on growth and production of fishes in polyculture where four different species such as rui (Labeo rohita). mrigal (Cirrhinus mrigala). common carp (Cyprinus carpio) and tilapia (Oreochromis niloticus) were cultured in 6 ponds under three treatments. each with two replications. https://www.findingthestory.com/product-category/concrete-cutting-saw/