In a large jug, add the tea bags and boiling water and let the tea brew for 15 minutes until nice and strong.
8 black tea bags, 1 litre boiling water
Remove the tea bags and add the granulated sugar to the jug. Stir to dissolve.
175 g granulated sugar
Add 2.5 litres of cold water to your brewing vessel (your large kombucha jar) and then add the brewed sweetened tea.
2.5 litres cold water
When the liquid in the vessel is between 70°F - 90°F (21°C - 32°C), add the starter tea and SCOBY.
500 ml starter tea, 1 SCOBY
Cover the jar with a breathable cotton cloth and secure it with an elastic band. Set it aside somewhere warm (so it stays between 70°F - 90°F / 21°C - 32°C) for 7-10 days.
Taste your kombucha after 7 days; if it is too sweet then leave it a few more days, if it is the desired tanginess then you are ready to move on to the second fermentation.