i'm trying to make a good wine and i make 6 batches just for testing ... I used Welch's concord and another brand of grape juice.. all of them i used yeast nutrient .. 3 used bread yeast .. 3 with lalvin RC-212 .. but all of them have the bad smell i'm not sure if it Sulfur dioxide or hydrogen sulfide ? i don't know the difference between them ... the temp is 75 to 80 maximum .. still in primary fermentation 7 days with airlocks on..
what to do?
what to do?