Abstract: This is an apparatus for generating a controlled current of fluid in a tank or swimming pool. It can be used for exercise, recreation, rehabilitation, stationary swimming and serious training. It comprises of a tank with a large rectangular inlet at one end through which the fluid is forced by a centrifugal system positioned in front of the tank. The water flow is stabilized before entering the tank, so that a river-like, non-turbulent current is created in the tank, to allow for stationary swimming, exercising, rehabilitation and recreational activities. At the other end of the tank, water is collected and circulated back to the centrifugal system through a large channel or pipe. While others used propellers or paddles to create a water current in a pool, this original apparatus uses a centrifugal system to achieve better results and move efficiently a large quantity of water.