Originally Posted by mkub
If you buy juice that is pasturizied(ultra violet), do you still need to use the campden tablets?
In theory, no... That being said, a few years ago I had some of that wonderful, cloudy, brown colored fresh pressed apple juice known here in the US as "cider" & it was UV treated. I thought this would be as good as heat pasturization & wasn't technology wonderful. So I did NOT sanitize that must, just proceeded to make cyser with it. It developed a "flowers of wine" infection & due to my inexperience with that problem, I nearly lost the batch before I figured out what was wrong. I was able to save it, but it still tastes a bit funky, I'm hoping age will help it to clear up. So, if it were me, I'd sulfite the must just as if it were not treated at all. That's my 2 cents worth, hope you fine some of it useful. Regards, GF.