I have a pair of kit wines in secondary (Barolo and Gewertz) for about tthree onths now. The kits included the sulfites, but I plan on aging these in the bottles for over a year at least. For added protection, I planned on adding additional sulfites. My question is two fold:
1) I have a bag of k-meta poweder and a bottle of Campden Tablets....which is better?
2) How much of eaither one should I use at bottling time to protect the batch?