https://www.youtube.com/watch?v=0wTt8VGyBdk

Starting yeast from scratch

• Use a approx. 1 qt "breathable" jar
  • need breathability to exchange oxygen and carbon dioxide
• equal parts water and flour (by weight)
  • (~2 tbsp water and 3 tbsp flour)
  • alternately use unsweetened pineapple juice in stead of water (lowers ph and provides additional natural sugar for yeast)
  • (for water, used distilled or highly filtered as tap water can have chlorine and other chemicals which make it more difficult for yeast to get started)
• stir and set aside
  • stir three times per day
• every day add 2 tbsp water and 3 tbsp flour
• bubbling should begin after 3-5 days

Ongoing feeding and maintenance

• can keep in fridge to slow down reaction and feed only once a week for small batch baking
• if doing baking more frequently, feed it every day
• When using, use up half of the overall quantity and then continue feeding as before