Recirculating systems are setups that continuously reuse water or other fluids within a closed loop. These systems are commonly used in various applications, such as aquaculture, where fish are raised in tanks, and in hydroponics, where plants grow without soil. By filtering and treating the water, recirculating systems help maintain a stable environment, reducing the need for fresh water. In addition to aquaculture and hydroponics, recirculating systems are also found in heating and cooling applications, such as radiant heating and chilled water systems. They promote energy efficiency and sustainability by minimizing waste and conserving resources, making them an important technology in modern environmental management.