Combine 1 tablespoon grated turmeric and 1 teaspoon sugar in a mason jar. Add 3 tablespoons water and stir until the sugar dissolves.
Cover the jar with a clean towel or cheesecloth and secure with a rubber band. Place the jar into a dark corner.
The next day, add another tablespoon of turmeric, another teaspoon sugar, and 3 tablespoons water to the jar and stir well. Re-cover the jar and place back into the dark corner.
Repeat step 3 for an additional 2 days, or until the turmeric bug starts to bubble. It may take up to a week or more to start fermenting. Once it is bubbling it is ready to use as a starter for homemade sodas.
Notes
You can keep the bug alive by simply continuing to add more turmeric, sugar, and water. It will keep indefinitely as long as you keep feeding it!