I've just finished preparing my first fermented drink ever (Kvass) and I used a Mason jar to store the preparation during the 2 days of the fermentation process as advised by the various guides I found. However I've come to realized after 10 minutes that the jar's rubber seal is in fact leaking carbon dioxide.
Is this detrimental to the final product, will it still be safe to drink ?
I have properly sterilized the jar itself (though it might not be required for the fermentation but rather for the conservation of the drink) and I don't really mind it not being very fizzy therefore I was wondering if it was still safe to drink it.
I don't have any other stronger sealable container at the moment that isn't made of plastic so I'll have to go with that.