Abstract: A compact, low cost magnetic fluid conditioner to be removably attached at one side of a pipe through which a fluid (e.g. water, fuel, or the like) is conveyed. Two pairs of ceramic bar magnets are arranged within the conditioner in a 2.times.2 array. Each magnet is positioned so that its south magnetic pole is facing towards the fluid carrying pipe. Accordingly, a longitudinally extending magnetic field will be generated having concentrated lines of flux which penetrate the pipe and influence a relatively large volume of fluid passing therethrough per unit of time. In the case where the fluid is water, the magnetic field applied by the conditioner acts to soften the water, improve the taste, and lessen the possibility of damage to the interior of the pipe along which the water passes.