Why is it necessary to earth the Scalebuster ? The changes, which take place in the Scale-buster®, relate mainly to the precipitation of carbonates arising from the breakdown of dissolved bicarbonates. When any change takes place in the chemical structure of a substance that results in at least a temporary change in its constituents, there is a corresponding change in electrical charge. If this charge is not allowed to neutralise which in the case of the Scale-buster® is by means of grounding the charge to a suitable earth connection, then the desired changes may be restricted or limited in duration.