I've done a fair bit of beer brewing in the past, and a friend just asked about brewing kombucha. I'm off alcohol at the moment, so I was thinking this would be a cool way to use some of my equipment, so I'm starting to read up on it.
So, I'm gathering from what I am reading that for the primary fermentation, you need to have air circulation, and that's why people use a cloth on the top instead of an airlock? Is that a correct understanding, i.e. I should not use an airlock for the primary?