Recirculating Aquaculture System (RAS) Guide for Fish Farming

A recirculating aquaculture system, universally known as RAS, is a land-based fish farming technology that treats and reuses water continuously. Unlike traditional ponds, flow-through raceways, or cage systems, RAS does not rely on a constant flow of fresh water. Because up to 99 percent of water can be reused within a well-designed RAS, this technology has become increasingly attractive in water-scarce or land-constrained locations across Africa. As a result, intensive fish production can now happen close to urban markets. That means a farmer no longer…