>- Is diarrhea caused by too much killing of pathogens or just as well by killing the good flora?
A zapper can kill the beneficial bacteria that live in the intestines. It is important to drink sufficient water and to replace the intestinal bacteria. The best way to do this is to drink kefir, but a good yogurt or smoothie will work.
For information on many other things to do and not to do when zapping, read parasite Zapping and the Zapper.