An aquarium (100) filter (10,50) with water (103) stream diversion system and method of use thereof, having an intake (22,28,62), an outlet (24,64), and a pump (20,26,60) to draw water (103) into the intake (22,28,62,) and discharge water (103) from the outlet (24,64). The system further includes a water stream diversion conduit (30) having a first open end (32), an opposite second open end (34), and a fluid channel between the first and second open ends. The first open end (32) of the conduit (30) can releasably connect to the intake (22,62) of the pump (20,26,60) or the outlet (24,64) of the pump (20,26,60). When the conduit (30) is connected to the outlet (24,64) of the pump (20,26,60), the water (103) is diverted from the outlet (24,64) of the pump (20,26,60) into the conduit (30), for discharge from the conduit (30). When the conduit (30) is connected to the intake (22,62) of the pump (20,26,60), water (103) is drawn into the conduit (30) and discharged from the conduit (30) into the intake (22,62) of the pump (20,26,60).
