An undated weekly planner perfect for Kombucha brewers Practical and easy to use, this is the perfect agenda for Kombucha brewers. This 6x9" undated weekly planner & Kombucha log lets you keep track of your week and your home brewing all in one place. Kombucha log The Kombucha log pages make it easy to keep track of your home fermentation process for beginner and experienced brewers.