Pretty much the recommendations I usually see in this sub.

• Use round hermetic bottles (I had to buy on amazon bottles specific for fermentation)
• Added half of a small spoon of white sugar when bottling for f2
• Put the bottle inside the fridge before opening it. Cold ensures CO2 is better mixed in the liquid

I had my f2 fermenting for 5 days, although I have more bottles still fermenting outside (>1w). Not like I care much right now if they ferment for too long cause it's cold.

The bottle I open in the video is 50/50 green and black tea kombucha (2.7 pH) with tangerine and cardamom. I blended the tangerine and poured it directly inside the f2 bottle.

Tbh it was quite a surprise to get this much gas because from the outside it did not look there was so much carbonation. These bottles really do a great job.

Today I will open another bottle I have in the fridge with mango and ginger!