Yay! My water kefir is fizzy!

I must have brewed 4 batches before I started on the right track. There is so much conflicting information out there. Most people say that water kefir needs to breathe, just like kombucha, and should be covered with a cloth or filter, whilst others say you need a sealed container. My previous batches were not fizzy at all so, at the risk of exploding my container, I sealed my jar and wrapped it in a towel. I even put it cabinet under the sink just in case. I left it there for two days and checked it this morning. Voila! Fizzy cranberry flavored water kefir! The fizziness only lasted a few seconds but it was good while it lasted.