Abstract: A radial impeller includes a cover having a frusto-conical portion and multiple blades extending radially outwardly. Related mixing systems involve positioning the radial impeller with blades adjacent a flow opening of a tank to draw water through the flow opening when the impeller is rotated.

Abstract: Mixing systems including a radial impeller assembly positioned adjacent a flow opening of a tank are described.

Abstract: A baffle for insertion into a container. The baffle includes a concave surface defined by two essentially parallel line segments connected to each other at their ends by line segments subtending an angle. The baffle further includes structure for mounting to a container so that the line segments are essentially parallel to and offset from a side wall of the container. Preferably, structure for mounting is structure for suspending the baffle from a first end wall of said container without attachment to a container side wall. The concave surface is preferably a curvilinear concave surface and the contiguous line segments subtending an angle are in the form of an arc. The baffle is preferably glass coated and sized to pass through an opening in an end wall of the container.