Submersible water circulation system for enclosed tanks

A submersible, circulation system (1) for a body of water having a surface (22) and contained in a water tank (2) having side walls (4) and a floor (8), said circulation system including:

• a driving unit having a shell (7) extending along an axis (9) and including a pump (21) supported within the shell (7), said shell (7) having at least one inlet (13) and at least a first outlet (15) and being positionable on the floor (8) of the tank (2) with the first outlet (15) facing vertically upwardly perpendicular to a horizontal plane wherein the pump (21) continuously draws an incoming flow (30) of water from outside of the driving unit (3) adjacent the floor (8) of the tank (2) through the inlet (13) of the driving unit (3) with at least a portion of the continuously incoming flow (30) being driven by said pump (21) out of said driving unit (3) through the vertically upwardly facing first outlet (15), said vertically upwardly facing first outlet (15) being a thin, vertically upwardly facing, elongated slot positioned below the surface (22) of the body of water (20) and extending along the axis (9) of the shell (7) of the driving unit (3) and creating a vertically upwardly directed, thin, planar discharge (12) of water therethrough below the surface (22) of the body of water (20) directed vertically upwardly perpendicular to said horizontal plane toward the surface (22) of the body of water (20) and inducing water (18′) adjacent the outside of the shell (7) of the driving unit (3) along the axis (9) thereof to move vertically upwardly perpendicular to said horizontal plane with the planar discharge (12) of the first outlet (15) directed vertically upwardly perpendicular to said horizontal plane toward the surface (22) of the body of water (20) to establish a recurring overall water circulation pattern within the tank (2) up from adjacent the floor (8) and driving unit (3) toward the surface (22) of the body of water (20), outwardly therefrom toward the side walls (4), downwardly adjacent the side walls (4), and back inwardly adjacent the floor (8) toward the driving unit (3).