Campden tablets amount

I have fresh squeezed cider from an orchard with no additives. I will be adding campden tablets before doing my yeast. I have never used them before, so how many per gallon should I use and how long to wait before adding my yeast.

I am a cider newbe so any cider help would be nice.

Erik

Crush and add one Campden tablet per gallon, wait 24 hours, then pitch in your yeast. Simple as that!