How many days should there be between each 63-minute HC Zapper treatment?

If you have a strong Herx reaction the first time you use the zapper program, then I would wait a couple of days before continuing.

After some sessions, the reactions tend to be less and less, so you can try to do daily sessions.
These daily sessions are usually enough if you don't have a serious condition.

If, however you are trying to address a specific condition, the 63 minutes zapper is not enough. Dr Clark in her late book said the zapper should be used continuously when fighting something like cancer.

The zapper works by the harmonics contained in the waveform, and not by the freq itself, so it is much slower than using specific freqs agains specific conditions. On the other side, although slow, it works always, and it doesn't depends on having chosen the correct frequencies.

For more details, please check the link:
https://www.spooky2.com/forums/viewtopic.phpf=23&t=14794&sid=60a6289af08a894e53323daa46a98087