Abstract: These improvements are applicable to conditioners fitted with three independent magnetic fields, each generated by a magnet or set of magnets (3, 5, 7) and consisting in coupling to the first magnet or set of magnets (3) an auxiliary magnet or group of magnets (17) using a telescoping shaft (16), which complementary magnet (17) will tend to move away from the first magnetic field (3) and will carry a front or conical plug (18) which may move to a greater or lesser extent depending on the stream of fluid running through the conditioner, such that the greater the stream of water, the closer this auxiliary magnet (17) is and the greater the intensity of the magnetic field in the area (20) where the water flows through between the permanent magnet or magnet group (3) and its magnetically permeable body (4).