Ok so when I started I was getting mothers forming in all of my 16oz ex flip top bottles, always telling my friends to strain before drinking. I cured those by filling the bottles a little higher. Now when I switch to old beer bottles it's back and filling it up more doesn't seem to work. I have two shelfs in my closet I designate to bucha, my 1st ferment is 14 day(opposite weeks) and I do my second ferment in the beer bottles with 2 T of flavoring for three days(was thinking of only doing two for the next batch) any suggestions as to how to prevent the new mother cultures from forming? I would really like to open and drink it right from the bottle instead of having to strain it into another glass before straining.