The actual output of the zapper is just as strong at all frequencies, it is only this difference in sensitivity that makes some frequencies appear stronger.
My tests show the same results. The frequency used on the first Hulda Clark 's zapper was 30 000 Hz, and i think it was a good idea because it is easier to take more current in the body without damaging the veins.
I have one question for you Parazapper :
I agree with you that it is more efficient to use several electrodes in order to "create" many paths for the current to flow.
I also agree about the importance of using wet electrodes and a large contact area. It definetely increases the current flow.
However by doing this, even if the current manage to reach most of the areas of the chest, of the stomach, of the arms, of the legs, there are still areas which are hollow, with a poor or no conductivity, (in the lungs, in the digestive tube, in some lymph nodes, in the sinuses, in the nose).
How do you manage to kill the parasites in these areas and in the head ? (in the brain, in the sinuses, in the eyes, in the ears) These areas have a sensitive skin (except the ears) and it is not possible to use many electrodes around the head without having my vision becoming "white" because of the current flow. I don't think this is safe.
Also if the brain and nervous system does really function with electric currents, using current to zap the brain is not the safest thing...