Abstract: The present invention relates to an apparatus for preventing scaling and/or removing scale in a housing defining a hydraulic environment. The apparatus includes a non-metallic element, at least two coils wound around the element, and a control means. The non-metallic element is retrofittable or incorporable into the housing. The control means is operably coupled to the coils for provision of a magnetic field. The control means includes a microcontroller adapted to cooperate with a switching amplifier to form a closed loop for generation of the magnetic field of a predetermined strength.