Recirculating aquaculture systems (RAS) are innovative fish farming setups that recycle water to create a sustainable environment for aquatic life. These systems filter and purify water, allowing it to be reused multiple times, which reduces water consumption and minimizes waste. RAS can be used to raise various species, including tilapia, salmon, and trout. In RAS, fish are kept in tanks where water quality is closely monitored and controlled. Essential parameters like temperature, oxygen levels, and pH are maintained to ensure optimal growth conditions. This method not only enhances fish health but also allows for year-round production, making it a viable option for commercial aquaculture.