Embodiments described herein relate to apparatus and methods for treating bodies of fluid. In an embodiment an apparatus includes a first rod spacer comprising a first rod aperture. Such an apparatus may also include a second rod spacer comprising a second rod aperture, the first rod aperture and the second rod aperture being circumferentially aligned about a centerline axis. Further, the apparatus may include a conductive rod extending between the first rod spacer and the second rod spacer, a first portion of the conductive rod being engaged with the first rod aperture and a second portion of the conductive rod being engaged with the second rod aperture, the conductive rod being configured to generate a magnetic field in response to an electrical current applied to the conductive rod, wherein the conductive rod is submersible in a body of chlorinated fluid for treatment of the body of fluid with the magnetic field.