A mixing system for mixing components in a vessel having a top portion and a bottom portion, comprising: a stationary conduit connected to the top portion of the vessel that extends at least partially to the bottom portion; a rotating shaft having a first end and a second end disposed within said stationary conduit that rotates within said stationary conduit while the mixing system is in operation; wherein it comprises an impeller (10, 110) connected to said rotating shaft at said second end, said impeller (10, 110) comprising: a central disk portion having a center axis; at least a pair of extensions extending at an angle from the central disk portion; and at least two leading edges defined by an outer periphery of the central disk portion, each leading edge spanning from one extension to an adjacent extension, and each leading edge having at least a portion at which the radius of the leading edge from the center axis increases to form a continuous increasing radius curve, and wherein the stationary conduit extends from its upper mounting position into the vessel interior where it terminates at the upper surface of the rotating impeller, said termination providing a gap between the impeller and the stationary conduit; wherein the mixing system further comprises: an elastomeric material which mounts and fills the gap of the intersection of the stationary conduit and the rotating impeller to isolate the components in the vessel from the rotating shaft, or an attachment piece or component having a sphere or cone geometry, being attached or mounted to the stationary conduit, the sphere or cone extending downwardly and outwardly towards the impeller where it functions to isolate the components in the vessel from the rotating shaft. a stationary conduit connected to the top portion of the vessel that extends at least partially to the bottom portion; a rotating shaft having a first end and a second end disposed within said stationary conduit that rotates within said stationary conduit while the mixing system is in operation; wherein it comprises an impeller (10, 110) connected to said rotating shaft at said second end, said impeller (10, 110) comprising: a central disk portion having a center axis; at least a pair of extensions extending at an angle from the central disk portion; and at least two leading edges defined by an outer periphery of the central disk portion, each leading edge spanning from one extension to an adjacent extension, and each leading edge having at least a portion at which the radius of the leading edge from the center axis increases to form a continuous increasing radius curve, and wherein the stationary conduit extends from its upper mounting position into the vessel interior where it terminates at the upper surface of the rotating impeller, said termination providing a gap between the impeller and the stationary conduit; wherein the mixing system further comprises: an elastomeric material which mounts and fills the gap of the intersection of the stationary conduit and the rotating impeller to isolate the components in the vessel from the rotating shaft, or an attachment piece or component having a sphere or cone geometry, being attached or mounted to the stationary conduit, the sphere or cone extending downwardly and outwardly towards the impeller where it functions to isolate the components in the vessel from the rotating shaft. a central disk portion having a center axis; at least a pair of extensions extending at an angle from the central disk portion; and at least two leading edges defined by an outer periphery of the central disk portion, each leading edge spanning from one extension to an adjacent extension, and each leading edge having at least a portion at which the radius of the leading edge from the center axis increases to form a continuous increasing radius curve, and wherein the stationary conduit extends from its upper mounting position into the vessel interior where it terminates at the upper surface of the rotating impeller, said termination providing a gap between the impeller and the stationary conduit; wherein the mixing system further comprises: an elastomeric material which mounts and fills the gap of the intersection of the stationary conduit and the rotating impeller to isolate the components in the vessel from the rotating shaft, or an attachment piece or component having a sphere or cone geometry, being attached or mounted to the stationary conduit, the sphere or cone extending downwardly and outwardly towards the impeller where it functions to isolate the components in the vessel from the rotating shaft. an elastomeric material which mounts and fills the gap of the intersection of the stationary conduit and the rotating impeller to isolate the components in the vessel from the rotating shaft, or an attachment piece or component having a sphere or cone geometry, being attached or mounted to the stationary conduit, the sphere or cone extending downwardly and outwardly towards the impeller where it functions to isolate the components in the vessel from the rotating shaft.