same question, ... have started doing my first batch, used a larger piece of cabbage on top which i pushed down
it rose a bit after 2 or 3 days SO i pushed it back down
threw away the top layer after 7 days and bottled it &put it in the fridge
saw on you tube afterwards about the trick of using an open plastic bag filled with water on top
was wondering if i would do it for next batch ....
have not decided yet, am wondering
.... and trying to buy something that comes in a smaller glass jar than the opening of my glass jar for fermenting
i suppose filling up a glass jar to put on top of the bigger cabbage leaf that is on top should do the trick ....
BUT have been wondering exactly the same questions as OP, am i going to make myself sick by eating my home made ferments ????
so far, so good, have had some 4 times in 6 days ... and am still there !