RECIRCULATORY AQUACULTURE SYSTEM (RAS) is a technology where water is recycled and reused after mechanical and biological filtration which removes suspended matter and metabolites. This super-intensive aquaculture production method is used for high-density culture of various species of fish, utilizing minimum land area and water. New water is added to the tanks only to make up for splash out, evaporation and that used to flush out waste materials. The reconditioned water circulates through the system and not more than 3%-5% of the total water volume of the system is replaced daily. The management of recirculating systems relies heavily on the quantity and quality of feed and the type of filtration utilized. Numerous filter designs are used in recirculating systems, but the overall goal of all filtration is to remove metabolic wastes, excess nutrients, and solids from the water and provide good water quality for the aquatic organisms.