US Patent 7381326 Mega flow system

An aerated recirculated aquaculture system including a culture tank and an aeration and circulation system. The culture tank houses live aquaculture. The culture tank defines a first flow path. The aeration and circulation system includes an aeration device configured to aerate water. The aeration device defines a second flow path. The first flow path and second flow path at least partially defining a substantially closed flow path sequentially passing through the culture tank and the aeration device. The aeration and circulation system is configured to circulate the water around the substantially closed flow path.