[crubier]

Wait until you learn where the enzymes come from

[tomek_ycomb]

No, kvass and other 'fizzy drinks' are not kombucha

They get their fermentation from the air, ferment much lower, and do not rely on the skoby to keep it all working. On some level there is similarities, but its not the same

[crubier]

It's still "shroom in a jar". Kvass is made with yeast, which are fungi.