Okay still obviously fermenting, so will check SV Tuesday when I get home, have been reading for a day or two and several peeps around the globe seem to recommend only adding Campden at some times, looking at the specifics I am tempted to agree, first one is that obviously even if I wish to allow fermentation to progress do I need to add campden tablets and at what rate to if nothing else to prevent oxidisation after exposure to open air or would the wine tolerate a very limited exposure ?
If I need to stop fermentation and some folks advise Campden only stuns the yeast for a short while looking at advice I would be looking at at a 5 gallon rate 30 tablets ( 45 grams per tab) - 10 for 80mg tablet rate .45 grams + 5 tabs for error