What is scobi?

It seems like you may be referring to "kombucha scoby," which is a symbiotic culture of bacteria and yeast used to ferment the popular probiotic beverage kombucha. Scoby is an acronym for "Symbiotic Culture Of Bacteria and Yeast."

The scoby forms a thick, rubbery mat that floats on top of the kombucha during fermentation and is responsible for the transformation of sweet tea into tangy, fizzy kombucha. It helps to protect the fermenting liquid from harmful bacteria and yeast while allowing the beneficial bacteria and yeast to thrive.

Scobys can be purchased from specialty stores or obtained from a friend who brews kombucha. They can be reused multiple times for making kombucha, and will grow and multiply with each batch.

It's important to take care of your scoby by keeping it clean, healthy, and stored properly in between brews. It's also important to note that scobys are living cultures, so they require regular feeding and attention to ensure they remain healthy and active.