I have seen various posts about adding water, you shouldn't add water, tomato juice is better, it doesn't matter, etc, lol. When you say cover it do you mean with something air permeable like gauze or really cover it by putting the screw on cover back on it? I left it uncovered because I thought that was necessary for the bacteria required for fermentation to get in it.
I thought of another question, lol. I just picked 2 more ML tomatoes that will ripen inside over the next 2-3 days. Can I just keep adding to this jar, with the juice that is in there or should I start a new jar for each time? I might need to eat more Talenti Gelato before the end of the season. I hear the empty Fudge brownie and Double Dark Chocolate containers result in better fermentation of tomato seeds.