MasontopsPickle Pipes - Waterless Airlock Fermentation Lids - Wide Mouth Mason Jar Fermenter Cap - Premium Silicone Top

I store sourdough starter in mason jars ns it sometimes develops dark hooch ns i have stet over . would these help my situation?

Do you still needs weights?

Where to buy the metal jar lids to hold the Airlock Lids to jars?

How much space do i need to leave at the top of the jar so it doesn’t overflow. my first one overflowed but i think i may have filled it too much. tha